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二氧化氯是杀菌效能较强的消毒剂,用于饮水消毒可减少水中三卤甲烷的产生,因此应用日渐广泛。测定溶液中二氧化氯含量,一般采用碘量法和DPD法。当溶液中含有次氯酸时,碘量法不能区分测定,故测出量偏高。DPD法能区分测定,但只能测定总有效氯浓度在5mg/L以下的溶液。
Chlorine dioxide is a disinfectant with strong bactericidal effect. It can be used in drinking water disinfection to reduce the generation of trihalomethanes in water, so it is widely used. Determination of chlorine dioxide solution, the general method of using iodine and DPD method. When the solution contains hypochlorous acid, the iodometric method can not distinguish the determination, it measured the amount of high. DPD method can distinguish between the determination, but only the determination of the total effective chlorine concentration of 5mg / L below the solution.