Potassium persulfate was used to digest water sample, and all phosphorus in water sample was oxidized to orthophosphate. In acid medium, orthophosphate reacts with ammonium molybdate to form phosphomolybdic acid in the presence of antimony salt, which is then reduced by ascorbic acid to form a blue complex. The absorbance A is measured by non dispersive spectrophotometry. The total phosphorus concentration is calculated by comparing with the standard curve.
The products meet the environmental protection standard HJ / t-103-2003 and national standard gb11893-1989.
Th-zx300 total phosphorus water quality automatic analyzer is developed by our company, which is used to measure the concentration of total phosphorus in water. It is suitable for on-line and off-line detection of surface water, pollution source water quality, industrial and municipal wastewater and sewage.
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