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2. Nitrate test - Wikipedia

   en.wikipedia.org/wiki/Nitrate_test

   Devarda's alloy (Copper/Aluminium/Zinc) is a reducing agent.When reacted with nitrate in sodium hydroxide solution, ammonia is liberated. The ammonia formed may be detected by its characteristic odor, and by damp red litmus paper's turning blue, signalling that it is an alkali — very few gases other than ammonia evolved from wet chemistry are alkaline.

3. Berlin Method - Wikipedia

   en.wikipedia.org/wiki/Berlin_Method

   The Berlin Method of biological filtration is a method for maintaining a clean and stable environment within a saltwater aquarium, typically a coral reef system. This method relies on the use of ample live rock (rock with live marine organisms and bacteria on or in it).

4. Nitrate - Wikipedia

   en.wikipedia.org/wiki/Nitrate

   Through the Safe Drinking Water Act, the United States Environmental Protection Agency has set a maximum contaminant level of 10 mg/L or 10 ppm of nitrate in drinking water. [ 24 ] An acceptable daily intake (ADI) for nitrate ions was established in the range of 0–3.7 mg (kg body weight) −1 day −1 by the Joint FAO/WHO Expert Committee on ...

5. Water testing - Wikipedia

   en.wikipedia.org/wiki/Water_testing

   Water testing being conducted at a treatment facility in Broken Bow, Oklahoma. Water testing is a broad description for various procedures used to analyze water quality. Millions of water quality tests are carried out daily to fulfill regulatory requirements and to maintain safety. [1] Testing may be performed to evaluate:

6. Sodium nitrate - Wikipedia

   en.wikipedia.org/wiki/Sodium_nitrate

   Sodium nitrate is a white deliquescent solid very soluble in water. It is a readily available source of the nitrate anion (NO 3 − ), which is useful in several reactions carried out on industrial scales for the production of fertilizers , pyrotechnics , smoke bombs and other explosives , glass and pottery enamels , food preservatives (esp ...

7. Total dissolved solids - Wikipedia

   en.wikipedia.org/wiki/Total_dissolved_solids

   Bottled mineral water usually contains higher TDS levels than tap water. Total dissolved solids (TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular (colloidal sol) suspended form. TDS are often measured in parts per million (ppm).