|Range||MDL||Method||Kit Catalog No.||Refill Catalog No.|
|0-1 & 1-10 ppm||0.05 ppm||Stannous Chloride||K-8510||R-8510|
|2-30 ppm||2 ppm||Vanadomolybdophosphoric Acid||K-8530||R-8515|
|0-120 ppm||5 ppm||Vanadomolybdophosphoric Acid||K-8515||R-8515|
|0-30 & 30-300 ppm||5 ppm||Stannous Chloride||K-8510D||R-8510D|
|0-60 & 60-600 ppm||10 ppm||Stannous Chloride||K-8510A||R-8510A|
|0-120 & 120-1200 ppm||20 ppm||Stannous Chloride||K-8510B||R-8510B|
|0-1200 & 1200-12,000 ppm||200 ppm||Stannous Chloride||K-8510C||R-8510C|
|Range||Method||Kit Catalog No.|
|V-2000: 0-8.00 ppm / Spec: 0-5.00 ppm||Stannous Chloride||K-8513|
|0-80.0 ppm||Vanadomolybdophosphoric Acid||K-8503|
Phosphorus occurs naturally in rock formations in the earth’s crust, usually as phosphate. High phosphate concentrations in surface waters may indicate fertilizer runoff, domestic waste discharge, or the presence of industrial effluents or detergents. Although phosphates from these sources are usually poly-phosphates or organically bound, all will degrade to ortho or reactive phosphates with time.
Phosphate measurement is used to control scale and corrosion inhibitor levels in boilers and cooling towers. Both methods described below measure reactive phosphate, which will give a positive reaction prior to hydrolysis, and is usually termed ortho-phosphate.