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Factor & Method: Phosphate: Ascorbic acid or stannous chloride reduction after forming molybdate complex yields a blue color. Comparator Vanadate molybdate method yields yellow color. All kits determine orthophosphate concentrations. The ascorbic acid method must be used when testing salt water
Test system: Ascorbic acid octet comparator
Range/Sensitivity: 0.5, 1, 2, 3, 4, 6, 8, 10 ppm and 5, 10, 20, 30, 40, 60, 80, 100 ppm
# of Tests (# of reagent): 50 (2)
