英语词汇“titrate”造句子简单的方法、技巧、例句及翻译-英语例句辞典

Every dose at Columbia Care New York is consistent and titrated, meaning it’s increased, if need be, slowly over time. With pancreatic cancer, what Stephen needs is legalised cannabis 2019-09-04T04:00:00Z

With patients of color, she said, “I tend to select the lowest concentration, and then slowly titrate up.” Retinoids remain the gold standard for fighting acne and wrinkles. Here’s what you should know. 2021-05-04T04:00:00Z

It wasn’t the music — they’d been careful to include a finely titrated playlist of crowd pleasers. Jimmy Buffett Does Not Live the Jimmy Buffett Lifestyle 2018-02-08T05:00:00Z

“The new technologies allow us to ‘dial down’ human contact, to titrate its nature and extent,” she writes. Quality Time, Redefined 2011-04-30T04:37:02Z

Fosse’s aesthetic titrates Bruce’s self-righteousness while keeping him in the picture as an important artist. A Bob Fosse Film-Festival Diary 2018-08-20T04:00:00Z

Bilger is understandably preoccupied with titrating Gönner’s cloudy complicity in a regime of pure evil, a task that — to someone outside the family circle — may not seem particularly urgent or even possible to finish. A Grandson Investigates the ‘Reasonable’ Nazi in the Family 2023-05-14T04:00:00Z

Nurses are taking to social media to convey the extremity of their situations: They talk about war zones, about titrating a dozen IV drips while troubleshooting fluky ventilators, all without reliable stockpiles of supplies. Nurses are trying to save us from the virus, and from ourselves 2020-04-27T04:00:00Z

Now, guided by political calculus, the White House is trying to persuade Israel’s prime minister to titrate the lethal doses of bombing Gaza. US war machine fuels Israel's military 2023-11-07T05:00:00Z

"It's nice to be able to titrate in a virtual space for people who experience considerable distress even attempting to part with possessions." Virtual reality helps people with hoarding disorder practice decluttering 2023-10-16T04:00:00Z

This means that if a patient reacts badly to a dose of 0.50, Stanford might keep them on 0.25 for six months before titrating them to the higher dose. New side effects from Ozempic are emerging as more take the drug. Experts explain how to manage them 2023-10-08T04:00:00Z

“They could definitely have a lot of poor side effects, because they didn't titrate up to that level yet,” Godwin says. Ozempic is a serious drug with serious risks. Here’s what to know. 2023-08-01T04:00:00Z

He said Loftus "will work with the patient to start titrating them down" — or reducing the dosage — "to a normal dose range." “We’re still gonna say no”: UnitedHealthcare’s effort to deny coverage to chronically ill patient 2023-02-02T05:00:00Z

"Many people really titrate to their own comfort. A lot of people don't like to smoke too much. They get anxious," Grinspoon explains. Marijuana is more potent than it used to be. But is it dangerous? 2022-10-21T04:00:00Z

Note that the pH at the equivalence point of this titration is significantly greater than 7, as expected when titrating a weak acid with a strong base. Chemistry 2019-02-14T00:00:00Z

“The Eyes of Tammy Faye” entails another challenge, which is to titrate the correct balance of critique and cynicism. ‘The Eyes of Tammy Faye’ review: Biopic revisits 1980s televangelists with camp, thoughtfulness 2021-09-16T04:00:00Z

Down the hall, we titrate drips and manage vent settings for a man whose stem cell transplant cured his leukemia but ravaged the rest of his organs. Opinion | I Am Caught Between the Two Worlds of the I.C.U. and TV 2021-08-20T04:00:00Z

You’ve also got to get the timing and pacing right, as well as titrate how much to share and with whom. We’re All Socially Awkward Now 2020-09-01T04:00:00Z

When that didn’t help, another medicine was added and titrated up. His Immune System Went Out of Whack. The Usual Treatment Didn’t Work. Why? 2020-03-18T04:00:00Z

The hydrofluoric acid solution was titrated, and 68.43 mL of 0.3172 M sodium hydroxide was required to reach the equivalence point. Chemistry 2019-02-14T00:00:00Z

Maybe the act finds you morning groggy, coffee still titrating into your bloodstream as you shovel last night’s feta-speckled farro into a plastic container. Go ahead and microwave fish, and other office lunch etiquette you should ignore 2019-08-26T04:00:00Z

He was fascinated by chemicals and what happens to molecules when you combine them or titrate them or subject them to heat. Perspective | RIP Fooman Zybar, the Ann Landers of Washington’s 1960s hippie drug scene 2019-02-20T05:00:00Z

“Some people say it’s actually harder to do than general anesthetic, because it’s actually more difficult to titrate the drugs to get exactly what you want.” Awake on the Table 2019-01-30T05:00:00Z

Barbara Lee, the liberal Democratic representative from Northern California, knows well how to titrate rage in a palatable way; as a black woman in the House, she has had to learn. Opinion | Fury Is a Political Weapon. And Women Need to Wield It. 2018-09-29T04:00:00Z

Note that when H3PO3 is titrated under these conditions, only one proton of the acid molecule reacts. Chemistry 2019-02-14T00:00:00Z

The previous day, all five animals received carefully titrated doses of radioactive iodine, designed to destroy the overactive cells that had proliferated in their thyroid glands and flooded their bodies with hormones. The Mystery of the Wasting House-Cats 2017-05-16T04:00:00Z

The effect depends on a carefully titrated combination of distilled and saline water; a technician from the Koons studio had spent the morning making the aqueous recipe. The Daredevil of the Auction World 2016-06-27T04:00:00Z

The young men who wish to reboot their brains describe similar consequences as they titrate off the habit. Porn and the Threat to Virility 0002-11-29T05:00:00Z

It is unclear, for example, whether users 'titrate' their doses, adjusting their intake according to the potency. The cannabis experiment 2015-08-18T04:00:00Z

We worked over the next few months on titrating her diabetes and blood pressure medicines, and got her on a healthier diet. The Human Toll of Russian Roulette Medicine 2015-03-12T04:00:00Z

"At some point he will be exposed to the controversy and the media," Poppen said, but "we want to titrate that." Sgt. Bowe Bergdahl back in U.S., with a long recovery ahead 2014-06-13T04:00:00Z

We need to find ways that support the psyche's natural healing tendencies.These include creating trusting environments and communities where trauma can be safely represented, re-experienced in a titrated way, and re-encoded. A Potential Therapy for PTSD? 2013-02-13T09:15:00Z

Furthermore, the ability to titrate gas infusions rapidly may minimize oxygen-related toxicity. [Research Articles] Oxygen Gas-Filled Microparticles Provide Intravenous Oxygen Delivery 2012-06-27T18:55:14.913Z

So even in trained hands, it is very difficult to titrate just where you want. What Is Propofol--and How Could It Have Killed Michael Jackson? 2011-10-03T10:45:06.167Z

A 2 per cent bleach solution, containing very little excess base, was diluted with distilled water and the various dilutions titrated with thiosulphate after the addition of potassium iodide. Chlorination of Water 2011-09-13T02:00:32.243Z

Gases soluble in water, such as ammonia, hydrochloric acid, sulphuretted hydrogen, sulphur dioxide, &c., are estimated by passing a known volume of the gas through water and titrating the solution with a standard solution. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z

The ferrocyanide solution is standardized by dissolving 1 gramme of pure zinc in 6 cc. of hydrochloric acid, adding ammonium chloride, and titrating as before. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens"

While the sample is being tested for alkalinity it is advisable to add sulfate of alumina, which may be dissolving while the sample is being titrated. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The mixture is then cooled, acidified by means of sulphuric acid, and titrated with decinormal sodium thiosulphate solution. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades"

In one series the solutions were titrated directly, and after acidification in the other. Chlorination of Water 2011-09-13T02:00:32.243Z

A solution of carbonic oxide hæmoglobin, accurately titrated, serves as the standard of comparison. Histology of the Blood Normal and Pathological

The potassium cyanide solution is standardized by dissolving 0.5 gramme of pure copper in 5 cc. of nitric acid, diluting, adding 10 cc. of ammonia, and titrating exactly as described above. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens"

The acid is added and the lye well stirred, after which another sample is taken and again titrated as before. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

And in this Mortar he mixes and titrates with his Neighbour’s Pestle some of his fantasy and insight. The Book of Khalid

Diénert, Director of the Paris Service for investigating drinking water, adds 3 p.p.m. of available chlorine and allows the mixture to stand fifteen minutes after shaking; the residual chlorine is then titrated with thiosulphate. Chlorination of Water 2011-09-13T02:00:32.243Z

Alkalinity of the Soluble Ash—Official Cool the filtrate from 9 and titrate with N/10 hydrochloric acid, using methyl orange as an indicator. All About Coffee

When cadmium is not present the copper may be precipitated by boiling the acidulated ammoniacal solution with test lead and titrating, as before described, without removing the lead and copper from the solution. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens"

Should the filtrate be acid instead of alkaline, titrate with N/10 alkali and calculate the percentage of free fatty acid as oleic acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

Phenol-phthalein solution being added, the excess of potash is estimated by carefully titrating with standard hydrochloric acid solution. Scientific American Supplement, No. 488, May 9, 1885

After allowing the sludge to settle remove 10 c.cms. by means of a pipette and titrate by one of the following methods: Bunsen’s Method. Chlorination of Water 2011-09-13T02:00:32.243Z

Transfer the precipitate and filter to the beaker, or precipitating vessel, dissolve the precipitate in a small excess of the standard alkali, add a few drops of phenolphthalein solution, and titrate with the standard acid. All About Coffee

The excess of alkali is titrated with N/1 hydrochloric or sulphuric acid. The Handbook of Soap Manufacture

Wash the contents into about 200 cc. of cold water, and titrate the acidity as before. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

After letting stand 30 minutes, filter and then titrate 50 cc. of the filtrate against standard KOH solution, using phenolphthalein as indicator, 1 cc. of the alkali equals 0.009 gms. lactic acid. Human Foods and Their Nutritive Value

HCl and 1 c.cm. of starch solution and titrate with N/1000 sodium thiosulphate until colourless. Chlorination of Water 2011-09-13T02:00:32.243Z

The precipitate may be dried and weighed, or, better, titrated with uranium acetate. A Text-book of Assaying: For the Use of Those Connected with Mines.

After cooling, the liquid is titrated with N/2 aqueous KOH solution, using phenol-phthalein as indicator, this figure giving the amount of the total fatty acids present. The Handbook of Soap Manufacture

To quickly determine total alkali in soap a weighed portion of the soap may be ignited to a white ash and the ash titrated for alkalinity using methyl orange as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

Then the uncombined excess of alkali is titrated with half normal hydrochloric acid. Scientific American Supplement, No. 443, June 28, 1884

Titrating apparatus The author also describes the apparatus he employs for storing and titrating with baryta solution. Scientific American Supplement, No. 623, December 10, 1887

Boil till the solution clears, cool, dilute, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

About 7-8 grammes of the sample are dissolved in water, and made up to 100 c.c., and the total alkalinity determined by titrating 20 c.c. with N/1 acid, using methyl orange as indicator. The Handbook of Soap Manufacture

Pipette off 50 cubic centimeters into a 200 cubic centimeter beaker, dilute slightly with distilled water, add a few drops of methyl orange indicator and titrate with normal acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The solution, together with the washings, are titrated with N/4 sodium carbonate, using litmus as indicator. Nitro-Explosives: A Practical Treatise

Instead, an outside indicator solution is employed to which drops of the titrated solution are transferred for testing. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

The small quantity of white flocculent precipitate which may be observed in the acetic acid solution before titrating, contains the whole of the iron as ferric arsenate. A Text-book of Assaying: For the Use of Those Connected with Mines.

Total alkali is estimated by dissolving 2 grammes in distilled water, and titrating when cold, with N/1 acid, using methyl orange as indicator. The Handbook of Soap Manufacture

The carbonate remaining on the filter paper is dissolved in water and titrated as carbonate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The distillate is then titrated with standard ammonia. Nitro-Explosives: A Practical Treatise

Add 10 cc. of dilute sulphuric acid and titrate to a faint pink with the permanganate solution, adding it directly to the contents of the vacuum flask. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

Filter, wash with a little hot water; and titrate with standard ferrocyanide. A Text-book of Assaying: For the Use of Those Connected with Mines.

Free Carbonated Alkali.—The residue on the filter paper from the above determination is washed with hot water, and the aqueous filtrate titrated with N/10 acid, using methyl orange as indicator. The Handbook of Soap Manufacture

Add phenolphthalein to the filtrate and titrate with N/10 acid and calculate the per cent. of free alkali as sodium or potassium hydroxide. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The solution is then nearly neutralised with sodium carbonate, excess of bi-carbonate added, and after the addition of some starch solution titrated with N/20 iodine solution. Nitro-Explosives: A Practical Treatise

Both potassium bromate and cupric salts in solution will liberate iodine from an iodide, which is then titrated with the thiosulphate solution. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

This solution is permanent, its strength is determined by dissolving 0.2 gram of iron wire in 10 c.c. of dilute sulphuric acid, diluting to about a quarter of a litre, and titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

This figure may also be directly determined by titrating, with N/2 acid, the alcoholic solution of soap after the free caustic estimation, using lacmoid as indicator. The Handbook of Soap Manufacture

When dark colored oils or fats are being titrated it is often difficult to obtain a good end point with phenolphthalein. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

It is then diluted with water to 500 c.c., and an aliquot part titrated with N/10 silver nitrate solution, using potassium chromate as indicator; 240 parts of bromine correspond to 58 parts of acetone. Nitro-Explosives: A Practical Treatise

Add a solution containing about 3 grams of potassium iodide, as in the standardization, and titrate with thiosulphate solution until the yellow of the liberated iodine is nearly discharged. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

The precipitate of ammonic-magnesic phosphate is filtered off, dissolved, and titrated with uranium acetate, using the same standard solution as is used in the arsenic assay: 0.5 gram of arsenic equals 0.207 gram of phosphorus. A Text-book of Assaying: For the Use of Those Connected with Mines.

After cooling, sufficient pure neutralised glycerine is added to form one-third of the total volume, and the liquid titrated with N/2 caustic soda solution, using phenol-phthalein as indicator. The Handbook of Soap Manufacture

Heat until it boils, then titrate with tenth normal alkali and divide the reading by 2, which gives the percentage of free fatty acid as oleic. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

After the addition of phenolphthalein the acid is titrated, and the amount used calculated into oleic acid. Nitro-Explosives: A Practical Treatise

Add 1-2 cc. of freshly prepared starch solution and titrate to the disappearance of the blue color. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

To the clear cold solution potassium iodide is added, and after a few minutes the liberated iodine is titrated with "hypo," as already described. A Text-book of Assaying: For the Use of Those Connected with Mines.

Chlorides are estimated by titrating the neutral solution with N/10 silver nitrate solution, potassium chromate being used as indicator. The Handbook of Soap Manufacture

The mixture of fat and neutralized alcohol is then heated to boiling and titrated with tenth normal alkali solution, using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

As a check upon the results, the solution of alkaloid washed out was titrated with normal solution of oxalic acid. Scientific American Supplement, No. 492, June 6, 1885

In titrating solutions of alkali carbonates in the presence of phenolphthalein, the color change takes place when the carbonate has been converted to bicarbonate. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

An alkaline solution of potassium cyanide, to which a little potassium iodide has been added, can be assayed for its strength in cyanide by titrating with a standard solution of silver nitrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

The total quantity of these compounds may be ascertained by acidulating with acetic acid, and titrating with N/10 iodine solution, using starch paste as indicator. The Handbook of Soap Manufacture

To overcome this the alkali is titrated in absolute alcohol, filtering off the insoluble carbonate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The baryta water used is titrated before and after the operation, and from the difference is calculated the quantity of carbonate formed, and hence of the carbonic acid. Scientific American Supplement, No. 358, November 11, 1882

It is titrated with 0.30 N hydrochloric acid, using phenolphthalein in cold solution as an indicator and becomes colorless after the addition of 48.16 cc. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

It is best to have the assay solution and that used for standardising as nearly as possible alike, and to titrate the two solutions side by side. A Text-book of Assaying: For the Use of Those Connected with Mines.

The amount of sulphides may be estimated by titrating the hot soda solution, to which ammonia has been added, with an ammoniacal silver nitrate solution, 1 c.c. of which corresponds to 0.005 gramme Na2S. The Handbook of Soap Manufacture

The soluble portion is caustic hydrate and may be titrated as such. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The filtrate is treated with bicarbonate of soda, and titrated with chameleon solution in the way described above. Scientific American Supplement, No. 324, March 18, 1882

On titrating with standard acid, it required 15.26 cc. for a change in color, using phenolphthalein, and 17.90 cc. additional, using methyl orange as an indicator. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

Acids generally are detrimental to the precipitation, and must be neutralised before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

N/1 sulphuric acid, boiling for a few minutes, and titrating the excess of acid with N/1 caustic soda solution, using litmus as indicator. The Handbook of Soap Manufacture

Dissolve the residue in neutral alcohol and titrate with standard alkali using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

It is then titrated with decinormal silver nitrate till a drop of the solution is turned brown with neutral chromate. Scientific American Supplement, No. 324, March 18, 1882

The sample was titrated with hydrochloric acid until the pink of phenolphthalein disappeared, and on the addition of methyl orange the solution was colored pink. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

In another experiment, in which 50 c.c. of the ferrous sulphate solution were titrated with "permanganate," 48 c.c. of the latter were required. A Text-book of Assaying: For the Use of Those Connected with Mines.

Or the alkaline layer may be rendered acid and steam distilled; the distillate is made up to a known volume, and a portion titrated by the Koppeschaar method with standard bromine water. The Handbook of Soap Manufacture

Let stand with occasional shaking, for several hours, to permit the hydrolysis of all the anhydride; then dilute to about 200 cc., add phenolphthalein and titrate with N/1 NaOH. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The methods of reducing with iron and titrating this with chromate of potassa, etc., have given a constant average of from 98.60-99.01. Scientific American Supplement, No. 324, March 18, 1882

On titrating with hydrochloric acid, using phenolphthalein, 15.00 cc. were required. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

Effect of Varying Bulk.—Solutions containing the same quantity of iron and acid as the last, but diluted to various bulks, and titrated while boiling, gave the following results:— Bulk 30 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines.

This is then saponified with a known volume of standard alkali, the excess of which is titrated with acid, and the percentage of glycerol calculated from the amount of alkali absorbed. The Handbook of Soap Manufacture

Add 50 to 100 cc. hot, neutral alcohol, and titrate with N/2, N/4 or N/10 sodium hydroxide depending on the fatty acid content, using phenolphthalein as indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

It is again dissolved in HCl and titrated with uranium solution, or decomposed by tin, as noted below, and the manganese precipitated as binoxide with chlorine, and determined. Scientific American Supplement, No. 324, March 18, 1882

One hundred cubic centimeters of the solution, when titrated with 0.1062 N hydrochloric acid, using methyl orange as an indicator, requires 38.60 cc. for complete neutralization. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes

Besides the standard solutions, which are required for titrating an assay, permanent solutions of the metal or acid of equivalent strength are very useful. A Text-book of Assaying: For the Use of Those Connected with Mines.

It is advisable to titrate the crude anthranilic acid with standard alkali and phenolphthalein before starting the experiment. Organic Syntheses

For the carbonates about 1 gram may be weighed, washed into a 400 cubic centimeter beaker, diluted with distilled water, methyl orange indicator added and titrated with normal acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

Effect of zinc.—In each experiment 40 c.c. of the cyanide solution and .5 gram of zinc sulphate crystals were used and the bulk was made up to 100 c.c. before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

Add 5 grams of potassium iodide, dilute to 100 c.c., and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

Add dilute sulphuric acid in excess; filter off the yellow precipitate of sulphide of arsenic, dissolve it in nitric acid, and titrate with uranium acetate, as described under Arsenic. A Text-book of Assaying: For the Use of Those Connected with Mines.

The temperature is that of the solution before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

If borax is present the carbon dioxide is boiled off after neutralizing exactly to methyl orange; cool, add mannite and phenolphthalein and titrate the boric acid with standard alkali. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

These show the importance of always cooling before titrating, and of titrating the assay and standard at the same temperature. A Text-book of Assaying: For the Use of Those Connected with Mines.

These were carefully neutralised with the respective acids, rendered alkaline with 30 c.c. more of ammonia, cooled, diluted to bulk, and titrated. A Text-book of Assaying: For the Use of Those Connected with Mines.

The precipitate is filtered, washed with alcohol, dissolved in hot hydrochloric acid, and titrated with permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines.

The titrated solution was next reduced with sulphuretted hydrogen, brought to the same bulk as before, and again titrated; 47.9 c.c. of the permanganate of potassium solution were required. A Text-book of Assaying: For the Use of Those Connected with Mines.

Dissolve the ash in distilled water and titrate total alkalinity, using as indicator methyl orange cold or litmus boiling. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

The precipitate, freed from manganese, is then dissolved in hydrochloric acid and titrated. A Text-book of Assaying: For the Use of Those Connected with Mines.

It is best to titrate at once, although the loss by oxidation is only small after one hour's exposure. A Text-book of Assaying: For the Use of Those Connected with Mines.

This should be remembered, since when titrating arsenic assays with iodine it must be present; and students must avoid confounding the two titrations. A Text-book of Assaying: For the Use of Those Connected with Mines.

Run 50 c.c. of the cyanide into a flask; add a few drops of potassium iodide solution and titrate with the standard silver nitrate until there is a distinct permanent yellowish turbidity. A Text-book of Assaying: For the Use of Those Connected with Mines.

Cool and titrate with the N/2 hydrochloric acid, using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant.

Rate of Atmospheric Oxidation.—Solutions ready for titration were exposed to air at the ordinary temperature for varying lengths of time and then titrated. A Text-book of Assaying: For the Use of Those Connected with Mines.

The assay solution should be titrated at once, as it weakens on standing; and the "hypo" solution should be standardised every two or three days, as its strength is not constant. A Text-book of Assaying: For the Use of Those Connected with Mines.

This property is made use of in determining the quantity of uranium in pure solutions by titrating with permanganate of potassium solution as in the case with iron. A Text-book of Assaying: For the Use of Those Connected with Mines.

The solution, when boiled free from sulphuretted hydrogen, is ready for titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

Take 60 c.c. of the standard ferric chloride solution, add 20 c.c. of hydrochloric acid, boil and titrate in the same way as before. A Text-book of Assaying: For the Use of Those Connected with Mines.

Add a few drops of potassium iodide and titrate back with "silver nitrate." A Text-book of Assaying: For the Use of Those Connected with Mines.

In titrating, the solution should be cold, or not warmer than 30° C. The bulk may vary from 100 to 200 c.c.; but it is best always to work with the same volume. A Text-book of Assaying: For the Use of Those Connected with Mines.

The iron, of course, must be in excess, which excess is determined when the ore is dissolved by titrating with standard permanganate or bichromate of potash solution. A Text-book of Assaying: For the Use of Those Connected with Mines.

The assay solution may be acidified with acetic, sulphuric, or hydrochloric acid before titrating with "hypo;" but it must be only faintly so. A Text-book of Assaying: For the Use of Those Connected with Mines.

There were also 10 c.c. of soda solution, 3 or 4 drops of potassium iodide and sufficient water to bring the bulk to 100 c.c. before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

Dissolve the precipitated zinc sulphide in dilute hydrochloric acid, evaporate, dilute, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

Boil the precipitate with dilute sulphuric acid, filter, and titrate the filtrate with the permanganate of potassium solution after boiling off the sulphuretted hydrogen. A Text-book of Assaying: For the Use of Those Connected with Mines.

When dissolved, the solution is diluted to 100 c.c., and titrated in the manner described. A Text-book of Assaying: For the Use of Those Connected with Mines.

Add 10 grams of sodic acetate, and ferric chloride until the precipitate turns brown; dilute with water to half a litre, boil, and titrate with standard baric chloride, as described under Sulphur. A Text-book of Assaying: For the Use of Those Connected with Mines.

In these experiments the antimony and bismuth were present in the assay solution when titrated. A Text-book of Assaying: For the Use of Those Connected with Mines.

Twenty c.c. of the lead nitrate solution were taken, precipitated with sulphate of soda, and the precipitate dissolved in 10 grams of sodium acetate and titrated as before. A Text-book of Assaying: For the Use of Those Connected with Mines.

The assay should be contained in a pint flask, and be cooled before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

The manganese is determined in the titrated solution by precipitation as dioxide and titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

The assay is best contained in a glazed earthenware dish, and may be titrated hot or cold. A Text-book of Assaying: For the Use of Those Connected with Mines.

Iodine is at the same time liberated, and the amount of antimony reduced is got at by titrating with sodium hyposulphite, which measures the iodine set free. A Text-book of Assaying: For the Use of Those Connected with Mines.

The solution was exposed, cold, in an open beaker for varying lengths of time, and titrated with permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines.

Effect of Varying Temperature.—Solutions similar to the last were titrated and gave the following results:— Temperature 15° 30° 50° 70° Permanganate required 19.8 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines.

Effect of Varying Bulk.—These were all titrated at about 50° C., and were like the last, but with varying bulk. A Text-book of Assaying: For the Use of Those Connected with Mines.

Effect of Varying Bulk.—As before, 20 c.c. of the iron solution, and 10 c.c. of the dilute acid were diluted to the required volumes and titrated. A Text-book of Assaying: For the Use of Those Connected with Mines.

The solution can be heated to boiling before titrating without interfering with the result; but it is more convenient to work with the solution at about 50° C. Cold solutions must not be used. A Text-book of Assaying: For the Use of Those Connected with Mines.

Carbonic Acid, CO2.—A heavy gas, somewhat soluble in water; it is mainly used for providing an atmosphere in which substances may be dissolved, titrated, &c., without fear of oxidation. A Text-book of Assaying: For the Use of Those Connected with Mines.

In standardising the salt solution, then, weigh up, say 1.0150 gram of pure silver, dissolve and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

This will be practically pure, but the iron in it must be determined by dissolving and titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

Stir up with 30 or 40 c.c. of water, float a piece of litmus paper on the liquid and titrate with the standard solution of acid. A Text-book of Assaying: For the Use of Those Connected with Mines.

In one determine the iron by reducing and titrating in the way described under volumetric iron. A Text-book of Assaying: For the Use of Those Connected with Mines.

With sodic carbonate and caustic soda, a given weight of the sample is titrated with standard acid, and the equivalent of soda estimated from the alkalinity of the solution. A Text-book of Assaying: For the Use of Those Connected with Mines.

If not already neutral, it is neutralised by titrating cautiously with a solution of soda. A Text-book of Assaying: For the Use of Those Connected with Mines.

The quantity of titanium reduced is measured by titrating with permanganate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines.

Heat, and extract with water as before; add the sodium acetate and acetic acid; and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

In fact, the uranium acetate solution can be standardised by titrating with a known weight of phosphate, and calculating its equivalent of arsenic. A Text-book of Assaying: For the Use of Those Connected with Mines.

In the first-mentioned method this is done by titrating with a standard solution of iodine; and in the latter with a solution of uranium acetate. A Text-book of Assaying: For the Use of Those Connected with Mines.

Dilute sulphuric acid, made by adding one part of the acid to three of water, and titrating with the permanganate solution till a faint pink persists after warming for several hours. A Text-book of Assaying: For the Use of Those Connected with Mines.

Cool and titrate the remaining ferrous iron with the permanganate or bichromate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines.

It is diluted to 100 or 150 c.c., heated to boiling, and titrated with the uranium acetate solution, using that of potassic ferrocyanide as indicator. A Text-book of Assaying: For the Use of Those Connected with Mines.

In many cases the ore may be dissolved and immediately titrated without previous separation. A Text-book of Assaying: For the Use of Those Connected with Mines.

The following experiments show the effect of variation in the conditions of the titration:— Effect of Varying Temperature.—The solution should be titrated while boiling. A Text-book of Assaying: For the Use of Those Connected with Mines.

When the distillation is finished, the receiver is disconnected, and its contents washed out into a beaker and titrated with "hypo." A Text-book of Assaying: For the Use of Those Connected with Mines.

Effect of Exposure of the Iodine Solution.—Twenty c.c. of the iodine were diluted to 100 c.c., and exposed for varying lengths of time in open beakers at the ordinary temperature, and then titrated. A Text-book of Assaying: For the Use of Those Connected with Mines.

The percentage of magnesia found is multiplied by 1.4, and the result is deducted from the apparent percentage of lime got by titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

The ferrous iron is determined by dissolving another 2 grams in hydrochloric acid and at once titrating with the permanganate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines.

The solution is standardised by titrating a quantity of oxalic acid about equivalent to the lime present in the assay; 0.5 gram of lime is equivalent to 1.125 gram of crystallised oxalic acid. A Text-book of Assaying: For the Use of Those Connected with Mines.

Then add a few drops of the solution of potassium iodide, and titrate the liberated iodine with "hypo," using starch paste towards the end as an indicator. A Text-book of Assaying: For the Use of Those Connected with Mines.

The precipitate is dissolved and then titrated with uranium acetate, or it is evaporated with nitric acid, ignited, and weighed as pyrarsenate of magnesia. A Text-book of Assaying: For the Use of Those Connected with Mines.

Chlorine.—Weigh up two separate lots of 1 gram each; dissolve in 100 c.c. of water, and determine the chlorine by titrating with the standard silver nitrate solution, using chromate of potash as indicator. A Text-book of Assaying: For the Use of Those Connected with Mines.

Filter, acidulate the filtrate with an excess of 10 c.c. of acetic acid, dilute, boil, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

Dilute with water, and titrate the residual iron with standard solution of bichromate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines.

Take 50 c.c., tint with methyl orange, and titrate with the normal solution of acid. A Text-book of Assaying: For the Use of Those Connected with Mines.

A direct determination may be made by removing the tin from the titrated solution with sulphuretted hydrogen, filtering, nearly neutralising with ammonia, and boiling with a few grams of hyposulphite of soda. A Text-book of Assaying: For the Use of Those Connected with Mines.

The filtrate is treated with sodium phosphate, and the magnesia is weighed as pyrophosphate, or titrated with uranium acetate. A Text-book of Assaying: For the Use of Those Connected with Mines.

If a precipitation occurs, as is the case with ferric salts, &c., the solution is titrated with the precipitate in it. A Text-book of Assaying: For the Use of Those Connected with Mines.

Add 10 grams of sodic acetate, dilute with water, boil, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines.

The acid thus liberated is titrated, with a standard solution of alkali, in the alcoholic solution, and from the amount of free acid found the fluorine is calculated. A Text-book of Assaying: For the Use of Those Connected with Mines.

The solution containing the chromate is added, and the remaining ferrous iron titrated with the permanganate or bichromate of potassium solution, as described under Iron. A Text-book of Assaying: For the Use of Those Connected with Mines.

Ferric or aluminic salts would remove their equivalent of arsenic, and, consequently, must be removed before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines.

Take 50 c.c. of it; tint faintly yellow with methyl-orange and titrate with normal acid till the liquor acquires a permanent reddish tint. A Text-book of Assaying: For the Use of Those Connected with Mines.

The filtrate containing the iron is reduced with sulphuretted hydrogen, boiled till free from that gas, filtered and titrated with a standard solution of permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines.

Effect of Varying Temperature.—It is generally recommended to titrate the boiling solution, since it is possible that the precipitation is only complete on boiling. A Text-book of Assaying: For the Use of Those Connected with Mines.

The indicator is a saturated solution of iron alum, or a solution of ferric sulphate of equivalent strength made by titrating acid ferrous sulphate with potassium permanganate. A Text-book of Assaying: For the Use of Those Connected with Mines.

The quantity of residual acid is then determined by titrating with standard solution of alkali. A Text-book of Assaying: For the Use of Those Connected with Mines.

The solution is then titrated with "hypo" as usual. A Text-book of Assaying: For the Use of Those Connected with Mines.

In about an hour the decomposition is complete, and the solution is diluted with cold water, and titrated with the solution of bichromate or of permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines.

Effect of Varying Bulk.—These experiments were like those last mentioned, but were titrated boiling, and the volume was varied:— Bulk 50.0 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines.

单词	titrate
例句	titrate Every dose at Columbia Care New York is consistent and titrated, meaning it’s increased, if need be, slowly over time. With pancreatic cancer, what Stephen needs is legalised cannabis 2019-09-04T04:00:00Z With patients of color, she said, “I tend to select the lowest concentration, and then slowly titrate up.” Retinoids remain the gold standard for fighting acne and wrinkles. Here’s what you should know. 2021-05-04T04:00:00Z It wasn’t the music — they’d been careful to include a finely titrated playlist of crowd pleasers. Jimmy Buffett Does Not Live the Jimmy Buffett Lifestyle 2018-02-08T05:00:00Z “The new technologies allow us to ‘dial down’ human contact, to titrate its nature and extent,” she writes. Quality Time, Redefined 2011-04-30T04:37:02Z Fosse’s aesthetic titrates Bruce’s self-righteousness while keeping him in the picture as an important artist. A Bob Fosse Film-Festival Diary 2018-08-20T04:00:00Z Bilger is understandably preoccupied with titrating Gönner’s cloudy complicity in a regime of pure evil, a task that — to someone outside the family circle — may not seem particularly urgent or even possible to finish. A Grandson Investigates the ‘Reasonable’ Nazi in the Family 2023-05-14T04:00:00Z Nurses are taking to social media to convey the extremity of their situations: They talk about war zones, about titrating a dozen IV drips while troubleshooting fluky ventilators, all without reliable stockpiles of supplies. Nurses are trying to save us from the virus, and from ourselves 2020-04-27T04:00:00Z Now, guided by political calculus, the White House is trying to persuade Israel’s prime minister to titrate the lethal doses of bombing Gaza. US war machine fuels Israel's military 2023-11-07T05:00:00Z "It's nice to be able to titrate in a virtual space for people who experience considerable distress even attempting to part with possessions." Virtual reality helps people with hoarding disorder practice decluttering 2023-10-16T04:00:00Z This means that if a patient reacts badly to a dose of 0.50, Stanford might keep them on 0.25 for six months before titrating them to the higher dose. New side effects from Ozempic are emerging as more take the drug. Experts explain how to manage them 2023-10-08T04:00:00Z “They could definitely have a lot of poor side effects, because they didn't titrate up to that level yet,” Godwin says. Ozempic is a serious drug with serious risks. Here’s what to know. 2023-08-01T04:00:00Z He said Loftus "will work with the patient to start titrating them down" — or reducing the dosage — "to a normal dose range." “We’re still gonna say no”: UnitedHealthcare’s effort to deny coverage to chronically ill patient 2023-02-02T05:00:00Z Now, guided by political calculus, the White House is trying to persuade Israel’s prime minister to titrate the lethal doses of bombing Gaza. US war machine fuels Israel's military 2023-11-07T05:00:00Z "Many people really titrate to their own comfort. A lot of people don't like to smoke too much. They get anxious," Grinspoon explains. Marijuana is more potent than it used to be. But is it dangerous? 2022-10-21T04:00:00Z Note that the pH at the equivalence point of this titration is significantly greater than 7, as expected when titrating a weak acid with a strong base. Chemistry 2019-02-14T00:00:00Z “The Eyes of Tammy Faye” entails another challenge, which is to titrate the correct balance of critique and cynicism. ‘The Eyes of Tammy Faye’ review: Biopic revisits 1980s televangelists with camp, thoughtfulness 2021-09-16T04:00:00Z Down the hall, we titrate drips and manage vent settings for a man whose stem cell transplant cured his leukemia but ravaged the rest of his organs. Opinion \| I Am Caught Between the Two Worlds of the I.C.U. and TV 2021-08-20T04:00:00Z You’ve also got to get the timing and pacing right, as well as titrate how much to share and with whom. We’re All Socially Awkward Now 2020-09-01T04:00:00Z When that didn’t help, another medicine was added and titrated up. His Immune System Went Out of Whack. The Usual Treatment Didn’t Work. Why? 2020-03-18T04:00:00Z The hydrofluoric acid solution was titrated, and 68.43 mL of 0.3172 M sodium hydroxide was required to reach the equivalence point. Chemistry 2019-02-14T00:00:00Z Maybe the act finds you morning groggy, coffee still titrating into your bloodstream as you shovel last night’s feta-speckled farro into a plastic container. Go ahead and microwave fish, and other office lunch etiquette you should ignore 2019-08-26T04:00:00Z He was fascinated by chemicals and what happens to molecules when you combine them or titrate them or subject them to heat. Perspective \| RIP Fooman Zybar, the Ann Landers of Washington’s 1960s hippie drug scene 2019-02-20T05:00:00Z “Some people say it’s actually harder to do than general anesthetic, because it’s actually more difficult to titrate the drugs to get exactly what you want.” Awake on the Table 2019-01-30T05:00:00Z Barbara Lee, the liberal Democratic representative from Northern California, knows well how to titrate rage in a palatable way; as a black woman in the House, she has had to learn. Opinion \| Fury Is a Political Weapon. And Women Need to Wield It. 2018-09-29T04:00:00Z Note that when H3PO3 is titrated under these conditions, only one proton of the acid molecule reacts. Chemistry 2019-02-14T00:00:00Z The previous day, all five animals received carefully titrated doses of radioactive iodine, designed to destroy the overactive cells that had proliferated in their thyroid glands and flooded their bodies with hormones. The Mystery of the Wasting House-Cats 2017-05-16T04:00:00Z The effect depends on a carefully titrated combination of distilled and saline water; a technician from the Koons studio had spent the morning making the aqueous recipe. The Daredevil of the Auction World 2016-06-27T04:00:00Z The young men who wish to reboot their brains describe similar consequences as they titrate off the habit. Porn and the Threat to Virility 0002-11-29T05:00:00Z It is unclear, for example, whether users 'titrate' their doses, adjusting their intake according to the potency. The cannabis experiment 2015-08-18T04:00:00Z We worked over the next few months on titrating her diabetes and blood pressure medicines, and got her on a healthier diet. The Human Toll of Russian Roulette Medicine 2015-03-12T04:00:00Z "At some point he will be exposed to the controversy and the media," Poppen said, but "we want to titrate that." Sgt. Bowe Bergdahl back in U.S., with a long recovery ahead 2014-06-13T04:00:00Z We need to find ways that support the psyche's natural healing tendencies.These include creating trusting environments and communities where trauma can be safely represented, re-experienced in a titrated way, and re-encoded. A Potential Therapy for PTSD? 2013-02-13T09:15:00Z Furthermore, the ability to titrate gas infusions rapidly may minimize oxygen-related toxicity. [Research Articles] Oxygen Gas-Filled Microparticles Provide Intravenous Oxygen Delivery 2012-06-27T18:55:14.913Z So even in trained hands, it is very difficult to titrate just where you want. What Is Propofol--and How Could It Have Killed Michael Jackson? 2011-10-03T10:45:06.167Z A 2 per cent bleach solution, containing very little excess base, was diluted with distilled water and the various dilutions titrated with thiosulphate after the addition of potassium iodide. Chlorination of Water 2011-09-13T02:00:32.243Z Gases soluble in water, such as ammonia, hydrochloric acid, sulphuretted hydrogen, sulphur dioxide, &c., are estimated by passing a known volume of the gas through water and titrating the solution with a standard solution. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z The ferrocyanide solution is standardized by dissolving 1 gramme of pure zinc in 6 cc. of hydrochloric acid, adding ammonium chloride, and titrating as before. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" While the sample is being tested for alkalinity it is advisable to add sulfate of alumina, which may be dissolving while the sample is being titrated. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The mixture is then cooled, acidified by means of sulphuric acid, and titrated with decinormal sodium thiosulphate solution. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" In one series the solutions were titrated directly, and after acidification in the other. Chlorination of Water 2011-09-13T02:00:32.243Z A solution of carbonic oxide hæmoglobin, accurately titrated, serves as the standard of comparison. Histology of the Blood Normal and Pathological The potassium cyanide solution is standardized by dissolving 0.5 gramme of pure copper in 5 cc. of nitric acid, diluting, adding 10 cc. of ammonia, and titrating exactly as described above. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" The acid is added and the lye well stirred, after which another sample is taken and again titrated as before. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. And in this Mortar he mixes and titrates with his Neighbour’s Pestle some of his fantasy and insight. The Book of Khalid Diénert, Director of the Paris Service for investigating drinking water, adds 3 p.p.m. of available chlorine and allows the mixture to stand fifteen minutes after shaking; the residual chlorine is then titrated with thiosulphate. Chlorination of Water 2011-09-13T02:00:32.243Z Alkalinity of the Soluble Ash—Official Cool the filtrate from 9 and titrate with N/10 hydrochloric acid, using methyl orange as an indicator. All About Coffee When cadmium is not present the copper may be precipitated by boiling the acidulated ammoniacal solution with test lead and titrating, as before described, without removing the lead and copper from the solution. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" Should the filtrate be acid instead of alkaline, titrate with N/10 alkali and calculate the percentage of free fatty acid as oleic acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Phenol-phthalein solution being added, the excess of potash is estimated by carefully titrating with standard hydrochloric acid solution. Scientific American Supplement, No. 488, May 9, 1885 After allowing the sludge to settle remove 10 c.cms. by means of a pipette and titrate by one of the following methods: Bunsen’s Method. Chlorination of Water 2011-09-13T02:00:32.243Z Transfer the precipitate and filter to the beaker, or precipitating vessel, dissolve the precipitate in a small excess of the standard alkali, add a few drops of phenolphthalein solution, and titrate with the standard acid. All About Coffee The excess of alkali is titrated with N/1 hydrochloric or sulphuric acid. The Handbook of Soap Manufacture Wash the contents into about 200 cc. of cold water, and titrate the acidity as before. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. After letting stand 30 minutes, filter and then titrate 50 cc. of the filtrate against standard KOH solution, using phenolphthalein as indicator, 1 cc. of the alkali equals 0.009 gms. lactic acid. Human Foods and Their Nutritive Value HCl and 1 c.cm. of starch solution and titrate with N/1000 sodium thiosulphate until colourless. Chlorination of Water 2011-09-13T02:00:32.243Z The precipitate may be dried and weighed, or, better, titrated with uranium acetate. A Text-book of Assaying: For the Use of Those Connected with Mines. After cooling, the liquid is titrated with N/2 aqueous KOH solution, using phenol-phthalein as indicator, this figure giving the amount of the total fatty acids present. The Handbook of Soap Manufacture To quickly determine total alkali in soap a weighed portion of the soap may be ignited to a white ash and the ash titrated for alkalinity using methyl orange as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Then the uncombined excess of alkali is titrated with half normal hydrochloric acid. Scientific American Supplement, No. 443, June 28, 1884 Titrating apparatus The author also describes the apparatus he employs for storing and titrating with baryta solution. Scientific American Supplement, No. 623, December 10, 1887 Boil till the solution clears, cool, dilute, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. About 7-8 grammes of the sample are dissolved in water, and made up to 100 c.c., and the total alkalinity determined by titrating 20 c.c. with N/1 acid, using methyl orange as indicator. The Handbook of Soap Manufacture Pipette off 50 cubic centimeters into a 200 cubic centimeter beaker, dilute slightly with distilled water, add a few drops of methyl orange indicator and titrate with normal acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The solution, together with the washings, are titrated with N/4 sodium carbonate, using litmus as indicator. Nitro-Explosives: A Practical Treatise Instead, an outside indicator solution is employed to which drops of the titrated solution are transferred for testing. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The small quantity of white flocculent precipitate which may be observed in the acetic acid solution before titrating, contains the whole of the iron as ferric arsenate. A Text-book of Assaying: For the Use of Those Connected with Mines. Total alkali is estimated by dissolving 2 grammes in distilled water, and titrating when cold, with N/1 acid, using methyl orange as indicator. The Handbook of Soap Manufacture The carbonate remaining on the filter paper is dissolved in water and titrated as carbonate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The distillate is then titrated with standard ammonia. Nitro-Explosives: A Practical Treatise Add 10 cc. of dilute sulphuric acid and titrate to a faint pink with the permanganate solution, adding it directly to the contents of the vacuum flask. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Filter, wash with a little hot water; and titrate with standard ferrocyanide. A Text-book of Assaying: For the Use of Those Connected with Mines. Free Carbonated Alkali.—The residue on the filter paper from the above determination is washed with hot water, and the aqueous filtrate titrated with N/10 acid, using methyl orange as indicator. The Handbook of Soap Manufacture Add phenolphthalein to the filtrate and titrate with N/10 acid and calculate the per cent. of free alkali as sodium or potassium hydroxide. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The solution is then nearly neutralised with sodium carbonate, excess of bi-carbonate added, and after the addition of some starch solution titrated with N/20 iodine solution. Nitro-Explosives: A Practical Treatise Both potassium bromate and cupric salts in solution will liberate iodine from an iodide, which is then titrated with the thiosulphate solution. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes This solution is permanent, its strength is determined by dissolving 0.2 gram of iron wire in 10 c.c. of dilute sulphuric acid, diluting to about a quarter of a litre, and titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. This figure may also be directly determined by titrating, with N/2 acid, the alcoholic solution of soap after the free caustic estimation, using lacmoid as indicator. The Handbook of Soap Manufacture When dark colored oils or fats are being titrated it is often difficult to obtain a good end point with phenolphthalein. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. It is then diluted with water to 500 c.c., and an aliquot part titrated with N/10 silver nitrate solution, using potassium chromate as indicator; 240 parts of bromine correspond to 58 parts of acetone. Nitro-Explosives: A Practical Treatise Add a solution containing about 3 grams of potassium iodide, as in the standardization, and titrate with thiosulphate solution until the yellow of the liberated iodine is nearly discharged. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The precipitate of ammonic-magnesic phosphate is filtered off, dissolved, and titrated with uranium acetate, using the same standard solution as is used in the arsenic assay: 0.5 gram of arsenic equals 0.207 gram of phosphorus. A Text-book of Assaying: For the Use of Those Connected with Mines. After cooling, sufficient pure neutralised glycerine is added to form one-third of the total volume, and the liquid titrated with N/2 caustic soda solution, using phenol-phthalein as indicator. The Handbook of Soap Manufacture Heat until it boils, then titrate with tenth normal alkali and divide the reading by 2, which gives the percentage of free fatty acid as oleic. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. After the addition of phenolphthalein the acid is titrated, and the amount used calculated into oleic acid. Nitro-Explosives: A Practical Treatise Add 1-2 cc. of freshly prepared starch solution and titrate to the disappearance of the blue color. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes To the clear cold solution potassium iodide is added, and after a few minutes the liberated iodine is titrated with "hypo," as already described. A Text-book of Assaying: For the Use of Those Connected with Mines. Chlorides are estimated by titrating the neutral solution with N/10 silver nitrate solution, potassium chromate being used as indicator. The Handbook of Soap Manufacture The mixture of fat and neutralized alcohol is then heated to boiling and titrated with tenth normal alkali solution, using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. As a check upon the results, the solution of alkaloid washed out was titrated with normal solution of oxalic acid. Scientific American Supplement, No. 492, June 6, 1885 In titrating solutions of alkali carbonates in the presence of phenolphthalein, the color change takes place when the carbonate has been converted to bicarbonate. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes An alkaline solution of potassium cyanide, to which a little potassium iodide has been added, can be assayed for its strength in cyanide by titrating with a standard solution of silver nitrate. A Text-book of Assaying: For the Use of Those Connected with Mines. The total quantity of these compounds may be ascertained by acidulating with acetic acid, and titrating with N/10 iodine solution, using starch paste as indicator. The Handbook of Soap Manufacture To overcome this the alkali is titrated in absolute alcohol, filtering off the insoluble carbonate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The baryta water used is titrated before and after the operation, and from the difference is calculated the quantity of carbonate formed, and hence of the carbonic acid. Scientific American Supplement, No. 358, November 11, 1882 It is titrated with 0.30 N hydrochloric acid, using phenolphthalein in cold solution as an indicator and becomes colorless after the addition of 48.16 cc. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes It is best to have the assay solution and that used for standardising as nearly as possible alike, and to titrate the two solutions side by side. A Text-book of Assaying: For the Use of Those Connected with Mines. The amount of sulphides may be estimated by titrating the hot soda solution, to which ammonia has been added, with an ammoniacal silver nitrate solution, 1 c.c. of which corresponds to 0.005 gramme Na2S. The Handbook of Soap Manufacture The soluble portion is caustic hydrate and may be titrated as such. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The filtrate is treated with bicarbonate of soda, and titrated with chameleon solution in the way described above. Scientific American Supplement, No. 324, March 18, 1882 On titrating with standard acid, it required 15.26 cc. for a change in color, using phenolphthalein, and 17.90 cc. additional, using methyl orange as an indicator. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Acids generally are detrimental to the precipitation, and must be neutralised before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. N/1 sulphuric acid, boiling for a few minutes, and titrating the excess of acid with N/1 caustic soda solution, using litmus as indicator. The Handbook of Soap Manufacture Dissolve the residue in neutral alcohol and titrate with standard alkali using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. It is then titrated with decinormal silver nitrate till a drop of the solution is turned brown with neutral chromate. Scientific American Supplement, No. 324, March 18, 1882 The sample was titrated with hydrochloric acid until the pink of phenolphthalein disappeared, and on the addition of methyl orange the solution was colored pink. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes In another experiment, in which 50 c.c. of the ferrous sulphate solution were titrated with "permanganate," 48 c.c. of the latter were required. A Text-book of Assaying: For the Use of Those Connected with Mines. Or the alkaline layer may be rendered acid and steam distilled; the distillate is made up to a known volume, and a portion titrated by the Koppeschaar method with standard bromine water. The Handbook of Soap Manufacture Let stand with occasional shaking, for several hours, to permit the hydrolysis of all the anhydride; then dilute to about 200 cc., add phenolphthalein and titrate with N/1 NaOH. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The methods of reducing with iron and titrating this with chromate of potassa, etc., have given a constant average of from 98.60-99.01. Scientific American Supplement, No. 324, March 18, 1882 On titrating with hydrochloric acid, using phenolphthalein, 15.00 cc. were required. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Effect of Varying Bulk.—Solutions containing the same quantity of iron and acid as the last, but diluted to various bulks, and titrated while boiling, gave the following results:— Bulk 30 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines. This is then saponified with a known volume of standard alkali, the excess of which is titrated with acid, and the percentage of glycerol calculated from the amount of alkali absorbed. The Handbook of Soap Manufacture Add 50 to 100 cc. hot, neutral alcohol, and titrate with N/2, N/4 or N/10 sodium hydroxide depending on the fatty acid content, using phenolphthalein as indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. It is again dissolved in HCl and titrated with uranium solution, or decomposed by tin, as noted below, and the manganese precipitated as binoxide with chlorine, and determined. Scientific American Supplement, No. 324, March 18, 1882 One hundred cubic centimeters of the solution, when titrated with 0.1062 N hydrochloric acid, using methyl orange as an indicator, requires 38.60 cc. for complete neutralization. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Besides the standard solutions, which are required for titrating an assay, permanent solutions of the metal or acid of equivalent strength are very useful. A Text-book of Assaying: For the Use of Those Connected with Mines. It is advisable to titrate the crude anthranilic acid with standard alkali and phenolphthalein before starting the experiment. Organic Syntheses For the carbonates about 1 gram may be weighed, washed into a 400 cubic centimeter beaker, diluted with distilled water, methyl orange indicator added and titrated with normal acid. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Effect of zinc.—In each experiment 40 c.c. of the cyanide solution and .5 gram of zinc sulphate crystals were used and the bulk was made up to 100 c.c. before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. Add 5 grams of potassium iodide, dilute to 100 c.c., and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. Add dilute sulphuric acid in excess; filter off the yellow precipitate of sulphide of arsenic, dissolve it in nitric acid, and titrate with uranium acetate, as described under Arsenic. A Text-book of Assaying: For the Use of Those Connected with Mines. The temperature is that of the solution before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. If borax is present the carbon dioxide is boiled off after neutralizing exactly to methyl orange; cool, add mannite and phenolphthalein and titrate the boric acid with standard alkali. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. These show the importance of always cooling before titrating, and of titrating the assay and standard at the same temperature. A Text-book of Assaying: For the Use of Those Connected with Mines. These were carefully neutralised with the respective acids, rendered alkaline with 30 c.c. more of ammonia, cooled, diluted to bulk, and titrated. A Text-book of Assaying: For the Use of Those Connected with Mines. The precipitate is filtered, washed with alcohol, dissolved in hot hydrochloric acid, and titrated with permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. The titrated solution was next reduced with sulphuretted hydrogen, brought to the same bulk as before, and again titrated; 47.9 c.c. of the permanganate of potassium solution were required. A Text-book of Assaying: For the Use of Those Connected with Mines. Dissolve the ash in distilled water and titrate total alkalinity, using as indicator methyl orange cold or litmus boiling. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The precipitate, freed from manganese, is then dissolved in hydrochloric acid and titrated. A Text-book of Assaying: For the Use of Those Connected with Mines. It is best to titrate at once, although the loss by oxidation is only small after one hour's exposure. A Text-book of Assaying: For the Use of Those Connected with Mines. This should be remembered, since when titrating arsenic assays with iodine it must be present; and students must avoid confounding the two titrations. A Text-book of Assaying: For the Use of Those Connected with Mines. Run 50 c.c. of the cyanide into a flask; add a few drops of potassium iodide solution and titrate with the standard silver nitrate until there is a distinct permanent yellowish turbidity. A Text-book of Assaying: For the Use of Those Connected with Mines. Cool and titrate with the N/2 hydrochloric acid, using phenolphthalein as an indicator. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Rate of Atmospheric Oxidation.—Solutions ready for titration were exposed to air at the ordinary temperature for varying lengths of time and then titrated. A Text-book of Assaying: For the Use of Those Connected with Mines. The assay solution should be titrated at once, as it weakens on standing; and the "hypo" solution should be standardised every two or three days, as its strength is not constant. A Text-book of Assaying: For the Use of Those Connected with Mines. This property is made use of in determining the quantity of uranium in pure solutions by titrating with permanganate of potassium solution as in the case with iron. A Text-book of Assaying: For the Use of Those Connected with Mines. The solution, when boiled free from sulphuretted hydrogen, is ready for titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. Take 60 c.c. of the standard ferric chloride solution, add 20 c.c. of hydrochloric acid, boil and titrate in the same way as before. A Text-book of Assaying: For the Use of Those Connected with Mines. Add a few drops of potassium iodide and titrate back with "silver nitrate." A Text-book of Assaying: For the Use of Those Connected with Mines. In titrating, the solution should be cold, or not warmer than 30° C. The bulk may vary from 100 to 200 c.c.; but it is best always to work with the same volume. A Text-book of Assaying: For the Use of Those Connected with Mines. The iron, of course, must be in excess, which excess is determined when the ore is dissolved by titrating with standard permanganate or bichromate of potash solution. A Text-book of Assaying: For the Use of Those Connected with Mines. The assay solution may be acidified with acetic, sulphuric, or hydrochloric acid before titrating with "hypo;" but it must be only faintly so. A Text-book of Assaying: For the Use of Those Connected with Mines. There were also 10 c.c. of soda solution, 3 or 4 drops of potassium iodide and sufficient water to bring the bulk to 100 c.c. before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. Dissolve the precipitated zinc sulphide in dilute hydrochloric acid, evaporate, dilute, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. Boil the precipitate with dilute sulphuric acid, filter, and titrate the filtrate with the permanganate of potassium solution after boiling off the sulphuretted hydrogen. A Text-book of Assaying: For the Use of Those Connected with Mines. When dissolved, the solution is diluted to 100 c.c., and titrated in the manner described. A Text-book of Assaying: For the Use of Those Connected with Mines. Add 10 grams of sodic acetate, and ferric chloride until the precipitate turns brown; dilute with water to half a litre, boil, and titrate with standard baric chloride, as described under Sulphur. A Text-book of Assaying: For the Use of Those Connected with Mines. In these experiments the antimony and bismuth were present in the assay solution when titrated. A Text-book of Assaying: For the Use of Those Connected with Mines. Twenty c.c. of the lead nitrate solution were taken, precipitated with sulphate of soda, and the precipitate dissolved in 10 grams of sodium acetate and titrated as before. A Text-book of Assaying: For the Use of Those Connected with Mines. The assay should be contained in a pint flask, and be cooled before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. The manganese is determined in the titrated solution by precipitation as dioxide and titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. The assay is best contained in a glazed earthenware dish, and may be titrated hot or cold. A Text-book of Assaying: For the Use of Those Connected with Mines. Iodine is at the same time liberated, and the amount of antimony reduced is got at by titrating with sodium hyposulphite, which measures the iodine set free. A Text-book of Assaying: For the Use of Those Connected with Mines. The solution was exposed, cold, in an open beaker for varying lengths of time, and titrated with permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of Varying Temperature.—Solutions similar to the last were titrated and gave the following results:— Temperature 15° 30° 50° 70° Permanganate required 19.8 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of Varying Bulk.—These were all titrated at about 50° C., and were like the last, but with varying bulk. A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of Varying Bulk.—As before, 20 c.c. of the iron solution, and 10 c.c. of the dilute acid were diluted to the required volumes and titrated. A Text-book of Assaying: For the Use of Those Connected with Mines. The solution can be heated to boiling before titrating without interfering with the result; but it is more convenient to work with the solution at about 50° C. Cold solutions must not be used. A Text-book of Assaying: For the Use of Those Connected with Mines. Carbonic Acid, CO2.—A heavy gas, somewhat soluble in water; it is mainly used for providing an atmosphere in which substances may be dissolved, titrated, &c., without fear of oxidation. A Text-book of Assaying: For the Use of Those Connected with Mines. In standardising the salt solution, then, weigh up, say 1.0150 gram of pure silver, dissolve and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. This will be practically pure, but the iron in it must be determined by dissolving and titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. Stir up with 30 or 40 c.c. of water, float a piece of litmus paper on the liquid and titrate with the standard solution of acid. A Text-book of Assaying: For the Use of Those Connected with Mines. In one determine the iron by reducing and titrating in the way described under volumetric iron. A Text-book of Assaying: For the Use of Those Connected with Mines. With sodic carbonate and caustic soda, a given weight of the sample is titrated with standard acid, and the equivalent of soda estimated from the alkalinity of the solution. A Text-book of Assaying: For the Use of Those Connected with Mines. If not already neutral, it is neutralised by titrating cautiously with a solution of soda. A Text-book of Assaying: For the Use of Those Connected with Mines. The quantity of titanium reduced is measured by titrating with permanganate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines. Heat, and extract with water as before; add the sodium acetate and acetic acid; and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. In fact, the uranium acetate solution can be standardised by titrating with a known weight of phosphate, and calculating its equivalent of arsenic. A Text-book of Assaying: For the Use of Those Connected with Mines. In the first-mentioned method this is done by titrating with a standard solution of iodine; and in the latter with a solution of uranium acetate. A Text-book of Assaying: For the Use of Those Connected with Mines. Dilute sulphuric acid, made by adding one part of the acid to three of water, and titrating with the permanganate solution till a faint pink persists after warming for several hours. A Text-book of Assaying: For the Use of Those Connected with Mines. Cool and titrate the remaining ferrous iron with the permanganate or bichromate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines. It is diluted to 100 or 150 c.c., heated to boiling, and titrated with the uranium acetate solution, using that of potassic ferrocyanide as indicator. A Text-book of Assaying: For the Use of Those Connected with Mines. In many cases the ore may be dissolved and immediately titrated without previous separation. A Text-book of Assaying: For the Use of Those Connected with Mines. The following experiments show the effect of variation in the conditions of the titration:— Effect of Varying Temperature.—The solution should be titrated while boiling. A Text-book of Assaying: For the Use of Those Connected with Mines. When the distillation is finished, the receiver is disconnected, and its contents washed out into a beaker and titrated with "hypo." A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of Exposure of the Iodine Solution.—Twenty c.c. of the iodine were diluted to 100 c.c., and exposed for varying lengths of time in open beakers at the ordinary temperature, and then titrated. A Text-book of Assaying: For the Use of Those Connected with Mines. The percentage of magnesia found is multiplied by 1.4, and the result is deducted from the apparent percentage of lime got by titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. The ferrous iron is determined by dissolving another 2 grams in hydrochloric acid and at once titrating with the permanganate of potassium solution. A Text-book of Assaying: For the Use of Those Connected with Mines. The solution is standardised by titrating a quantity of oxalic acid about equivalent to the lime present in the assay; 0.5 gram of lime is equivalent to 1.125 gram of crystallised oxalic acid. A Text-book of Assaying: For the Use of Those Connected with Mines. Then add a few drops of the solution of potassium iodide, and titrate the liberated iodine with "hypo," using starch paste towards the end as an indicator. A Text-book of Assaying: For the Use of Those Connected with Mines. The precipitate is dissolved and then titrated with uranium acetate, or it is evaporated with nitric acid, ignited, and weighed as pyrarsenate of magnesia. A Text-book of Assaying: For the Use of Those Connected with Mines. Chlorine.—Weigh up two separate lots of 1 gram each; dissolve in 100 c.c. of water, and determine the chlorine by titrating with the standard silver nitrate solution, using chromate of potash as indicator. A Text-book of Assaying: For the Use of Those Connected with Mines. Filter, acidulate the filtrate with an excess of 10 c.c. of acetic acid, dilute, boil, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. Dilute with water, and titrate the residual iron with standard solution of bichromate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. Take 50 c.c., tint with methyl orange, and titrate with the normal solution of acid. A Text-book of Assaying: For the Use of Those Connected with Mines. A direct determination may be made by removing the tin from the titrated solution with sulphuretted hydrogen, filtering, nearly neutralising with ammonia, and boiling with a few grams of hyposulphite of soda. A Text-book of Assaying: For the Use of Those Connected with Mines. The filtrate is treated with sodium phosphate, and the magnesia is weighed as pyrophosphate, or titrated with uranium acetate. A Text-book of Assaying: For the Use of Those Connected with Mines. If a precipitation occurs, as is the case with ferric salts, &c., the solution is titrated with the precipitate in it. A Text-book of Assaying: For the Use of Those Connected with Mines. Add 10 grams of sodic acetate, dilute with water, boil, and titrate. A Text-book of Assaying: For the Use of Those Connected with Mines. The acid thus liberated is titrated, with a standard solution of alkali, in the alcoholic solution, and from the amount of free acid found the fluorine is calculated. A Text-book of Assaying: For the Use of Those Connected with Mines. The solution containing the chromate is added, and the remaining ferrous iron titrated with the permanganate or bichromate of potassium solution, as described under Iron. A Text-book of Assaying: For the Use of Those Connected with Mines. Ferric or aluminic salts would remove their equivalent of arsenic, and, consequently, must be removed before titrating. A Text-book of Assaying: For the Use of Those Connected with Mines. Take 50 c.c. of it; tint faintly yellow with methyl-orange and titrate with normal acid till the liquor acquires a permanent reddish tint. A Text-book of Assaying: For the Use of Those Connected with Mines. The filtrate containing the iron is reduced with sulphuretted hydrogen, boiled till free from that gas, filtered and titrated with a standard solution of permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of Varying Temperature.—It is generally recommended to titrate the boiling solution, since it is possible that the precipitation is only complete on boiling. A Text-book of Assaying: For the Use of Those Connected with Mines. The indicator is a saturated solution of iron alum, or a solution of ferric sulphate of equivalent strength made by titrating acid ferrous sulphate with potassium permanganate. A Text-book of Assaying: For the Use of Those Connected with Mines. The quantity of residual acid is then determined by titrating with standard solution of alkali. A Text-book of Assaying: For the Use of Those Connected with Mines. The solution is then titrated with "hypo" as usual. A Text-book of Assaying: For the Use of Those Connected with Mines. In about an hour the decomposition is complete, and the solution is diluted with cold water, and titrated with the solution of bichromate or of permanganate of potassium. A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of Varying Bulk.—These experiments were like those last mentioned, but were titrated boiling, and the volume was varied:— Bulk 50.0 c.c. A Text-book of Assaying: For the Use of Those Connected with Mines.
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