| 单词 | ferrocyanide |
| 例句 | So Liu and his colleagues replaced the salts with a nitrogen-based compound called ammonium that allows at least twice as much ferrocyanide to dissolve, doubling the battery's capacity. New generation of ‘flow batteries’ could eventually sustain a grid powered by the sun and wind 2018-10-31T04:00:00Z He extensively used potassium ferrocyanide to bleach detail into dark areas. For retiree Jerry Gay, former Seattle Times photographer, it’s a quiet life now 2018-01-20T05:00:00Z The Harvard team realized that a possible bromine replacement was a charge-carrying molecule called ferrocyanide, which sounds dangerous but is actually used as a food additive. A cleaner, greener way to store solar and wind energy 2015-09-24T04:00:00Z He admonished them for sending their spies to a foreign country equipped with “soap made of potassium ferrocyanide or toilet water that contains lead acetate.” Invisible Ink War: How Chemists Revealed Germany’s Secret WW I Writing [Excerpt] 2014-04-05T11:30:00Z The powdered ferrocyanide is then added, together with the colophonium, and the heating is continued until a slight smell of cyanogen is noticed. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z On exposure to ultraviolet light, the compounds react to form a dye called Prussian Blue, or ferric ferrocyanide. The Surprising Subject of the First Book of Photographs 2011-12-23T18:45:04.903Z After thorough drying for forty-eight hours, there was placed on the surface of each board a few drops of a solution of potassium ferrocyanide. Paint Technology and Tests 2011-09-15T02:00:12.263Z Potassium ferrocyanide gives a precipitate even in very dilute solution. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" 2011-08-24T02:00:20.690Z White Gunpowder: a mixture of potassium chlorate, potassium ferrocyanide, and sugar. The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar 2011-04-14T02:00:59.373Z Another mixture is 1.8 part aniline salt, 12 parts potassium ferrocyanide, 200 parts water, 3.5 parts potassium chlorate dissolved in water. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 8 "Dubner" to "Dyeing" 2010-12-26T03:00:17.840Z 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" We do not expect to obtain the results of a ferruginous treatment from the administration of a ferrocyanide or a ferricyanide. The Mechanism of Life Add the ferrocyanide solution; cool and dilute to exactly 1 liter. Dietetics for Nurses Ammonia gives a characteristic blue coloration when added to a solution of a copper salt; potassium ferrocyanide gives a brown precipitate, and, if the solution be very dilute, a brown colour is produced. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" They are soluble in water and give characteristic precipitates with platinic and auric chlorides, and with potassium ferrocyanide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" But the best of the lot is a solution of the two substances potassium ferricyanide and potassium bromide, which forms an image of silver ferrocyanide and silver bromide. Bromide Printing and Enlarging A Practical Guide to the Making of Bromide Prints by Contact and Bromide Enlarging by Daylight and Artificial Light, With the Toning of Bromide Prints and Enlargements Ammonium chloride in a potassium ferrocyanide solution produces growths shaped like catkins, and the alkaline chlorides tend to produce vermiform growths. The Mechanism of Life The chemical actions giving rise to the formation of the metallic ferrocyanide, of which the image consists, are quite complicated. Photographic Reproduction Processes Prepare concentrated solutions of 1¾ lb. aniline salt in 1 gallon water, 1½ lb. ferrocyanide of potash in ¾ gallons water and 1½ lb. potassium chlorate in 1½ gallons water. The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student They give a characteristic pale red precipitate with sodium pyrophosphate, soluble in an excess of the precipitant; they also form precipitates on the addition of platinic chloride and potassium ferrocyanide. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" Titanium green is a ferrocyanide of that metal, produced by adding yellow prussiate of potash to a solution of titanic acid in dilute hydrochloric acid, and heating the mixture to ebullition rapidly. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Or we may treat the gelatine with ferrocyanide of potassium and salicylate of sodium mixed, and thus obtain an intermediary colour on the addition of FeSO4. The Mechanism of Life Potassium ferrocyanide and uranium nitrate produce a warm sepia tone. Photographic Reproduction Processes Give albumin or very dilute solution of ferrocyanide of potassium. Aids to Forensic Medicine and Toxicology 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. The acid is poured all at once upon the ferrocyanide, the cold produced by the mixing being sufficient to moderate the action. A System of Instruction in the Practical Use of the Blowpipe Being A Graduated Course Of Analysis For The Use Of Students And All Those Engaged In The Examination Of Metallic Combinations Graham had already obtained colourless jellies by the interaction of concentrated solutions of ferrocyanide of potassium and sulphate of copper. The Mechanism of Life Red coloration is due to decomposition into ferrocyanide of copper. Photographic Reproduction Processes Tests.—Ammonia, a white precipitate soluble in excess, reprecipitated by sulphuretted hydrogen; ferrocyanide of potassium, a white precipitate; sulphuretted hydrogen, a white precipitate in pure and neutral solutions. Aids to Forensic Medicine and Toxicology Titrate the boiling solution with the sodium phosphate till it ceases to give a brown colouration with potassium ferrocyanide. A Text-book of Assaying: For the Use of Those Connected with Mines. Potassium ferrocyanide in particular affords a very pretty experiment, and reacts in the cold. Scientific American Supplement, No. 832, December 12, 1891 These were obtained from gelatine and tannin, from acetate of copper or lead, and from nitrate of mercury in an aqueous solution of ferrocyanide of potassium. The Mechanism of Life A spiral of platinum wire is employed as the cathode, and the presence of the metal confirmed for by dissolving it in a little nitric acid, diluting with water and adding potassium ferrocyanide. Scientific American Supplement, No. 810, July 11, 1891 The iron may be dissolved by placing the stain in a dilute solution of hydrochloric acid, when, on adding ferrocyanide of potassium, Prussian blue is produced. Aids to Forensic Medicine and Toxicology The precipitate of zinc ferrocyanide formed in the assay solution is white; but if traces of iron are present, it becomes bluish. A Text-book of Assaying: For the Use of Those Connected with Mines. When a ferrocyanide is added to a solution of a sesquioxide of iron, Prussian blue or ferrocyanide of iron is produced. Scientific American Supplement, No. 483, April 4, 1885 Tamman has also made a number of experiments with solutions of the chlorides and sulphates of the heavy metals, and solutions of phosphates, silicates, ferrocyanides, and other salts. The Mechanism of Life He begins by forming the phantom, in the usual way, upon paper prepared with ferrocyanide, and exposes it to daylight for a sufficient length of time. Scientific American Supplement, No. 470, January 3, 1885 The salt should be carefully tested with ferric chloride for the presence of ferrocyanides, which give a blue color with ferric salts. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes If the quantity of ferrocyanide required is known within a few c.c., the finishing point is exactly determined in the first titration without any addition of the standard zinc solution. A Text-book of Assaying: For the Use of Those Connected with Mines. F. The conversion of the cyanide into the ferrocyanide is greatly facilitated by the presence of finely divided sulphuret of iron and caustic potash. Scientific American Supplement, No. 483, April 4, 1885 B�tschli also has recently described the microscopic appearance of precipitated membranes produced by ferrocyanide of potassium and acetate or chloride of iron. The Mechanism of Life These projects involve items such as gunpowder, acetylene, hydrogen, lead, mercury, sulfuric acid, nitric acid, cadmium, potassium sulfate, potassium cyanide, potassium ferrocyanide, copper sulfate, and hydrochloric acid. The Boy Mechanic: Volume 1 700 Things for Boys to Do To a solution of sulphate of copper, add a solution of ferrocyanide of pottasium, so long as a precipitate continues to be formed. Young's Demonstrative Translation of Scientific Secrets Most metals give precipitates with ferrocyanide of potassium in acid solutions. A Text-book of Assaying: For the Use of Those Connected with Mines. The ferrocyanide of potassium is a chemical reagent of great value, giving rise to precipitates with the neutral or slightly acid solutions of metals, like the beautiful brown ferrocyanide of copper, and that of lead. Scientific American Supplement, No. 483, April 4, 1885 It consists of a vessel of porous porcelain, the pores of which are filled with a colloidal solution of ferrocyanide of copper. The Mechanism of Life Soluble ferrocyanides, ferricyanides, and sulphocyanides of various metals, by forming dibasic salts with potassium, sodium, or ammonium, in conjunction with vegetable, animal, or metallic coloring matters. Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. If the solution of cyanide of potassium that is used is strong, the greater portion of the ferrocyanide of potassium crystalises in the solution, and may be collected and preserved for use again. Young's Demonstrative Translation of Scientific Secrets Run in 47 or 48 c.c. of the "ferrocyanide" solution from an ordinary burette, and finish off cautiously. A Text-book of Assaying: For the Use of Those Connected with Mines. It is also made by melting the ferrocyanide of potassium with sulphide of potassium. Scientific American Supplement, No. 483, April 4, 1885 In this way he studied the mutual reactions of solutions of ferrocyanide of potash, chloride of iron, and the sulphates of copper, iron, manganese, and zinc. The Mechanism of Life An iodide or bromide in connection with ferrocyanide of potassium and starch combined with the pulp. Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. If iron is present it must be removed, since ferrous salts use up much cyanide, forming ferrocyanides, and ferric salts yield ferric hydrate, which obscures the end reaction. A Text-book of Assaying: For the Use of Those Connected with Mines. Effect of other substances.—It was found that an alkaline cyanate, sulphocyanate, ferrocyanide, nitrite, borate, silicate or carbonate has no effect. A Text-book of Assaying: For the Use of Those Connected with Mines. The sulphocyanide of potassium, KCsy, is prepared by fusing ferrocyanide of potassium, deprived of its water of crystallization, intimately mixed with half its weight of sulphur and 17 parts of carbonate of potassa. Scientific American Supplement, No. 483, April 4, 1885 If the gelatine has been treated with a drop of potassium ferrocyanide solution instead of salicylate of sodium, a few drops of FeSO4 will give a blue pattern. The Mechanism of Life Treated finished paper with ferric- oxide salts and with ferrocyanides insoluble in water but soluble in acids. Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. Some of these, ferrocyanide and ferricyanide of potassium for example, have such characteristic properties that the fact that they are cyanides may be overlooked. A Text-book of Assaying: For the Use of Those Connected with Mines. The precipitate contains the zinc, which can be dissolved out by boiling with dilute sulphuric acid, and detected by the formation of a white precipitate on the addition of potassic ferrocyanide. 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. Certain chemical precipitates such as copper ferrocyanide can form membranes having properties analogous to those of osmotic membranes. The Mechanism of Life Introduced into paper, ferrocyanide of manganese and hydrated peroxide of iron. Forty Centuries of Ink or, a chronological narrative concerning ink and its backgrounds, introducing incidental observations and deductions, parallels of time and color phenomena, bibliography, chemistry, poetical effusions, citations, anecdotes and curiosa together with some evidence respecting the evanescent character of most inks of to-day and an epitome of chemico-legal ink. The solution of potassic ferrocyanide used as indicator is made by dissolving 10 grams of the salt in 100 c.c. of water. A Text-book of Assaying: For the Use of Those Connected with Mines. Fifty divided by the quantity of "ferrocyanide" solution required gives the standard. A Text-book of Assaying: For the Use of Those Connected with Mines. |
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