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Updated: June 14, 2025
The chloride is also somewhat soluble in solutions of many chlorides, in solutions of silver nitrate, and in concentrated nitric acid. As a matter of economy, the filtrate, which contains whatever silver nitrate was added in excess, may be set aside. !Method B. With the Use of a Paper Filter!
Filter off the carbonate and wash it with hot water, testing the slightly acidified washings for sulphate and preserving any precipitates which appear in these tests. Acidify the filtrate with hydrochloric acid until just acid, bring to boiling, and slowly add hot barium chloride solution, as in the preceding determination. Add also any tests from the washings in which precipitates have appeared.
Digest the contents of the stomach in cold distilled water and very dilute sulphuric acid; strain, filter, and press residue. Evaporate the filtrate to half its bulk, digest with alcohol, and evaporate alcohol off in a water-bath. Remove ether and allow it slowly to evaporate. Test resulting alkaloid. Tests. No change of colour with the mineral acids. White deposit with corrosive sublimate.
Then he poured the filtrate, if I may call it such, back into the original glass. A second he treated in the same way, and a third. He had nearly completed the round of the table when I heard a light step. My warning came only just in time. It was Burleigh. He saw us standing now in the colonnade, made some hasty remark, then walked on, as if in search for some one.
Filter through blotting paper, and to the clear filtrate add some phosphate of soda solution. A second precipitation proves the presence of magnesia. Sulphates. A solution of barium chloride and dilute hydrochloric acid gives a white turbidity. Chlorides. A solution of silver nitrate and nitric acid gives a white curdy precipitate. Test for Lead in Drinking Water.
Filter A, and carefully neutralize the filtrate with very dilute hydrochloric or acetic acid, equal to a precipitate of alkali-albumen. Filter off the precipitate, and on testing the filtrate, peptones are found. The intermediate bodies, the albumoses, are not nearly so readily obtained from pancreatic as from gastric digests. Experiment 75. Filter B and C, and carefully neutralize the filtrates.
Replace the beaker containing the original filtrate by a clean beaker, wash the precipitated sulphate by decantation with hot water, and subsequently upon the filter until it is freed from chlorides, testing the washings as described in the determination of iron.
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