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Phosphate: - Phosphorus occurs in natural waters as one of the forms of phosphates: ortho- or reactive phosphate, meta- or poly- (condensed) phosphate, and organic phosphate.
- Phosphates enter water supplies from soil runoff, cleaning operations, water treatment, boiler blowdown, and sewage. Although necessary for biological growth, too much phosphate causes excessive growth of aquatic plants and eutrophication. Industrial control includes maintenance of minimum levels in boilers and in cleaning operations.
| Method / Chemistry | Range (mg/L) | Smallest Increment | Approx. Number of Tests | Case Style | | Color disc / Ascorbic acid | 0-1 | 0.02 | 100 | 12x7.25x6 inches Blue Polypropylene Carrying Case | | 0-5 | 0.1 | | 0-50 | 1 |
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 Parameter/Range/Reagent Information
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