HACH Phosphorus, Orthophosphate (reactive) Test Kit, Model PO-19, Color Disc, 100 tests: Product #: 224800

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