Manual of qualitative analysis / by Robert Galloway.

  • Galloway, Robert.
Date:
1861
Catalogue details

Licence: Public Domain Mark

Credit: Manual of qualitative analysis / by Robert Galloway. Source: Wellcome Collection.

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    dry them as directed in the preceding paragraph. The dried slips must look distinctly red.”’ Preparation of turmeric paper.— Digest and heat one part of bruised turmeric root with six parts of weak spirit of wine, filter the tincture obtained, and steep slips of fine paper in the filtrate. The dried slips must exhibit a fine, yellow tint.” G64. List OF THE REAGENTS EMPLOYED IN THE DRY STATE, 45. Nitrate of ammonia is made by neutralizing nitric acid with carbonate of ammonia. The solution is evaporated until crystals begin to be deposited, and is then allowed to cool. The crystals are collected and placed in well-stop- pered bottles. 46. Cyanide of potassiwm must be of a milk-white colour, and perfectly free from any admixture of iron. 47. Sulphate of wron is principally employed for the de- tection of nitric acid. 48. Copper turnings are hkewise employed for the detec- tion of nitric acid. 49. Carbonate of soda must not contain any sulphurie or hydrochloric acid. 50. Biborate of soda (borax) is employed in blowpipe analysis. It should be heated below the fusing point to drive off its water of crystallization, and then powdered. 51. Phosphate of soda and ammonia (microcosmic salt) is likewise employed as a reagent in blowpipe analysis. APPARATUS. 65. The processes employed in qualitative analysis are exceedingly simple, and do not require much apparatus for