Patent ID: 7875460

Claim:
A method for determining the effective concentration of stabilized chlorine dioxide in a solution; said method comprising the steps of: a. creating a mobile phase eluent as a function of the ion chromatography apparatus to be used; b. further creating a suitability solution by adding a chlorite reference material to the mobile phase eluent; c. spiking the suitability solution with ions of interest selected from the group consisting of chlorate and chloride; d. yet further creating a standard solution by adding a known amount of chlorite reference material to the mobile phase eluent; e. still further creating an assay solution by adding a solution of stabilized chlorine dioxide being tested to the mobile phase eluent; f. obtaining an indication of environmental factors by analyzing the mobile phase eluent with the ion chromatography apparatus; g. further obtaining an indication of the peak size and chlorite ion concentration by analyzing the standard solution with the ion chromatography apparatus; h. yet further obtaining an indication of the commonality between the two chlorate and chlorite ions by analyzing the spiked suitability solution with the ion chromatography apparatus; i. still further obtaining an indication of the chlorite ion in the assay solution by analyzing the assay solution with the ion chromatography apparatus; and j. comparing the indications obtained in steps f, g and h with the indication obtained in step i) to determine the concentration of chlorite ions in the assay solution.