MOLYBDENUM BLUE ASSAY FOR MEASUREMENT OF CHEMICAL SPECIES

摘要

A process for measuring a concentration of a chemical species in an aqueous sample employing polyvinylpyrrolidone. The process comprises : providing an aqueous sample containing the chemical species; mixing the aqueous sample with a first reagent that comprises a solution of a molybdenum VI salt to provide a first solution; mixing the first solution with a second reagent that comprises a reducing agent to form a second solution; and measuring a property of the second solution to determine the concentration of the chemical species. Polyvinylpyrrolidone is added to the aqueous sample, the first reagent, the first solution or the second solution. The intensity of light absorbed or transmitted by the second solution may be used to determine the concentration of the chemical species.