Effect of Dimethylsulfoxide as a Masking Agent for Chlorine in the Selective Determination of Aqueous Chlorine Dioxide

Abstract For the selective determination of aqueous chlorine dioxide(ClO2) in the mixed solution with chlorine, dimethylsulfoxide(DMSO) was used as a masking agent for chlorine. In spectrophotometric and iodometric determination of ClO2, a large excess of DMSO did not affect on ClO2, but it completely depressed the interference from chlorine.