Examination of Water for Sanitary And Technic Purposes
The book Examination of Water for Sanitary And Technic Purposes was written by author Henry Leffmann Here you can read free online of Examination of Water for Sanitary And Technic Purposes book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Examination of Water for Sanitary And Technic Purposes a good or bad book?
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Leeds proposed a^method by treating the^water with silver nitrate, exposing to light until it OXYGEN-CONSUMING POWER. 39 settles perfectly clear, and determining the re- duced silver. These methods are open to the same objections as in the use of permanganate, and do not seem to possess any decided advantage. Qualitative re- sults of some interest may occasionally be ob- tained by the following method: 2C.c. ofaiper c6nt. solution of silver nitrate, rendered alkaline by ammonium hydroxid, are a...dded to 100 c.c. of the water in a stoppered bottle, which is then placed in full sunlight for two hours. Waters containing but little organic matter will not show at the end of this period any appreciable tint. The following procedure for direct oxidation is recommended by the APHA, and is probably as satisfactory as any yet proposed. Reagents : Dilute Sulfuric Acid. — Add 100 c.c. of sulfuric acid to 300 c.c. of distilled water, and potassium permanganate solution until a slight pink tint persists for several hours.
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