Examination of Water for Sanitary And Technic Purposes
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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.
What to read after Examination of Water for Sanitary And Technic Purposes?
You can find similar books in the "Read Also" column, or choose other free books by Henry Leffmann to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
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.
What to read after Examination of Water for Sanitary And Technic Purposes?
You can find similar books in the "Read Also" column, or choose other free books by Henry Leffmann to read onlineMoreLess
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