Uses, Tests for Purity and Preparation of Chemical Reagents: Employed in Qualitative, Quantitative, Volumetric, Docimastic, Microscopic and Petrographic Analysis, with a Supplement on the Use of the Spectroscope

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John L. Boland Book and Stationery Company, 1890 - Chemical tests and reagents - 258 pages
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Page 8 - The method given below ls has been found to be useful by the authors. Procedure.— Place a piece of the binder and a drop of concentrated phosphoric acid in a micro 15 x 125 mm. test tube fixed in an asbestos board. Cover the mouth of the test tube with a piece of filter paper moistened in aniline acetate solution (10% of aniline in 10% acetic acid) and weigh down with a watch glass.
Page 1 - ... subject, but rather to serve as a supplement to them, to aid the analyst in selecting, testing and preparing the reagents he needs, and to gather into a single volume information now scattered over a vast extent of chemical literature. The...
Page 128 - Cc of a mixture of 2 parts of concentrated sulphuric acid and 1 part of water down through the condenser tube.
Page 218 - He mapped 350 dark lines, and labeled the most prominent ones with letters of the alphabet beginning at the red end of the spectrum.
Page 139 - Bunsen2, who placed a measured volume of the gas in a graduated tube over mercury and added a certain volume of the liquid. The tube was then shaken in a water bath of constant temperature, the open end being screwed against an india-rubber plate. By repeatedly opening the end under mercury and then closing it again and shaking, saturation was obtained, the solubility being determined...
Page 216 - Gases or vapors, when sufficiently heated to becomeluminous, emit, under ordinary pressure, color rays which are dispersed into an interrupted spectrum of bright lines ; with increasing pressure and density these lines spread into diffuse luminous bands, and finally form a continuous spectrum.
Page 144 - Lt also serves to detect glycerin in wine, etc., by heating the solution to dryness, moistening with a drop or two of a mixture of equal parts of phenol and concentrated sulphuric acid and adding ammonia.
Page 176 - ... hydrochloric acid (about 30 cc. are needed), the acid solution filtered and agitated with ether until coloring matter is no longer extracted, then rendered alkaline with ammonia and agitated with three successive portions of ether of 25 cc. each ; after drying the ether with fused calcium chloride, the ethereal solution is separated, the ether distilled off and the residue weighed, after drying in a dessicator.

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