COMPOSITION AND METHOD FOR MEASURING ORTHOPHOSPHATE CONCENTRATION IN WATER SYSTEM AND USE OF SAID COMPOSITION

摘要

A composition for measuring concentration of orthophosphate in water system comprising an acid which is in solid form at ambient conditions, a color development agent for developing the phosphomolybdic acid, molybdate and optionally a filler which is used to quickly and directly measure orthophosphate in water without dilution. A method for quickly measuring the concentration of orthophosphate in water without dilution, comprising adding the composition to a water sample to form a solution and perform coloration, measuring absorbance of the solution under UV-Vis light, and determining the concentration of orthophosphate in the water.