The CA-6 Series Analyzers are a family of on-line sequential sampling analyzers that use Colorimetric technologies to perform an analysis. The CA6 phosphate, ortho-phosphate only, is offered in three ranges 0-5.00 mg/L, 0-50.00 mg/L and 0-250.0 mg/L. The measurement uses the molybdenum method with two reagents. Reagent 1, sodium molybdate in sulfuric acid, is added and forms a yellow phosphomolybdate compound. Reagent 2, a sulfite reducing agent, is added to the sample reducing the phosphomolybdate to molybdenum blue. The blue color is directly proportional to the ortho-phosphate concentration. Each analysis uses 0.33 ml of each reagent. Each analysis cycle takes approximately 9.5 minutes.
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