The organic analysis of potable waters / by J. A. Blair.

  • Blair, J. A. (James Andrew)
Date:
1890
Catalogue details

Licence: Public Domain Mark

Credit: The organic analysis of potable waters / by J. A. Blair. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    bottle. 10 c.c. of the solution are used for each operation, (3) Solution of Ferrous Sulphate.—Dissolve 50 grms. of the pure material in ^ of distilled water, add 1 c.c. of pure sulphuric acid, and boil for five minutes. Keep the solution in a glass-stoppered bottle. 10 c.c. of the solution will decolorise more than 10 c.c. of the permanganate solution. (4) Centinormal Solution of Barium Hydrate.—Dis- solve 3’15 grms. of crystallised hydrate in 1 litre of hot water, boiled free of carbonic acid. This solu- tion is centinormal for dibasic acids. Make the solu- tion strongly pink with phenol-phthalein. (5) Centinormal Solution of Oxalic Acid.—Dissolve 1‘26 grms. of the pure crystallised acid in 1 litre of distilled water. This solution is centinormal for di- acid bases. 10 c.c. of this solution will neutralise generally more than 10 c.c. of the baryta solution, because the baryta contains carbonate. (6) Solution of Phenol-phthalein. — Dissolve 0'5 grm. of the substance in 100 c.c. of distilled water, aiding its solution by adding 5 c.c. of rectified spirit. This solution is pink in alkaline, and colourless in acid or neutral solutions. PBINTBD BT ADLAED AND SON, BABTHODOSIEW CLOSE.