METHOD FOR MONITORING OF IMPURITIES IN WATER WITH HIGH SENSITIVITY AND APPARATUS USING THE SAME

摘要

PURPOSE: Provided are method for monitoring of impurities in water with high sensitivity and apparatus using the same which use a complex column including both cation and anion exchange resins so that it remarkably improves measurement sensitivity for cation electric conductivity. CONSTITUTION: The method comprises the steps of: (i) collecting cation in sample water to form strong acid with high dissociation degree; (ii) measuring electric conductivity of the sample water passed through a hydrogen-typed cation exchange resin column; (iii) passing the sample water through a chloride-typed anion exchange resin column and collecting anion in the sample water to form strong acid with high dissociation degree; (iv) measuring electric conductivity of the sample water passed through the chloride-typed anion exchange resin column; and (v) calculating difference between above two values in electric conductivity to measure concentration of weak acid with low dissociation degree in the sample water.