| 单词 | decantation |
| 例句 | In experiments, where the weight of the precipitate must be rigorously ascertained, decantation is preferable to filtration, providing the precipitate be several times washed in a considerable proportion of water. Elements of Chemistry, In a New Systematic Order, Containing all the Modern Discoveries The clear liquid is decanted through a tared filter, and the precipitate well washed with alcohol by decantation, and finally transferred to the filter, dried and weighed. The Handbook of Soap Manufacture By washing the powdered root quickly with it by decantation, the yellow and brown are extracted in the form of an opaque liquid. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists The solution is diluted with hot water and washed by decantation. A Text-book of Assaying: For the Use of Those Connected with Mines. The specimen must be repeatedly washed by decantation, until the washings are perfectly free from chlorine, when the whole may be thrown onto a filter merely to drain. Scientific American Supplement, No. 623, December 10, 1887 Much time may often be saved by washing precipitates by decantation, i.e., by pouring over them, while still in the original vessel, considerable volumes of wash-water and allowing them to settle. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes DECANTATION.—The purification of conjugial love may be compared with the purification of natural spirits, as effected by the chemists, and called decantation, 145. The Delights of Wisdom Pertaining to Conjugial Love When obtained, the colour must be quickly washed by decantation, or it changes first to violet and then to purple. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists Wash as much as possible by decantation with hot water. A Text-book of Assaying: For the Use of Those Connected with Mines. A red precipitate of chromous acetate is formed, which is washed by decantation in water containing carbonic acid. Scientific American Supplement, No. 497, July 11, 1885 Wash the precipitate twice by decantation with warm water; then transfer it to the filter with the aid of a stirring-rod with a rubber tip and a stream from the wash-bottle. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Filtration was an easy matter, more especially in the case of A. Examining the yeasts under the microscope, immediately after decantation, we found that both of them remained very pure. The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology) The mode of proceeding is to calcine the berry in a covered vessel, and well wash the resulting charcoal with boiling water by decantation. Field's Chromatography or Treatise on Colours and Pigments as Used by Artists If no yellowish precipitate is formed, decant off the rest of the liquid, and wash the precipitated metal with hot water two or three times by decantation. A Text-book of Assaying: For the Use of Those Connected with Mines. This crude material should be melted under water and washed by decantation several times with hot water. Organic Syntheses Pour the liquid above the precipitates through the filters, wash twice by decantation and transfer the precipitates to the filters, finally washing them until free from silver solution as described. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Wash twice by decantation with 100 cc. of hot water. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Wash the precipitate twice by decantation, and finally transfer it to the original filter. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The silica is washed by decantation two or three times with hydrochloric acid and hot water, before being thrown on to the filter. A Text-book of Assaying: For the Use of Those Connected with Mines. |
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