METHOD FOR SIMULTANEOUS DETERMINATION OF HEXAVALENT CHROMIUM AND TRIVALENT CHROMIUM BY HIGH-PERFORMANCE CATION-EXCHANGE ION CHROMATOGRAPHY WITH UV DETECTION

摘要

PURPOSE: A method for simultaneously analyzing hexavalent chromium and trivalent chromium with ion chromatography is provided to analyze components rapidly and correctly in a sample. CONSTITUTION: A method for simultaneously analyzing hexavalent chromium and trivalent chromium includes the following steps of: separating mixed components of the hexavalent chromium and the trivalent chromium with a mixed solvent; combining the trivalent chromium with a chelating agent by adding a moving phase of which pH is 6.5-6.8; performing chromatography analysis by injecting the moving phase to an ion chromatography(IC) column; converting the hexavalent chromium to a fluometric reagent; and separating absorbance of the trivalent chrome with a UV-absorption photometer.