生活饮用水中二氧化氯快速测定方法研究

水中二氧化氯与N,N-二乙基对苯二胺（DPD）反应产生粉色,其中二氧化氯中20%的氯转化成亚氯酸盐,显色反应与水中二氧化氯含量成正比,甘氨酸将水中的氯离子转化为氯化氨基乙酸而不干扰二氧化氯测定。研究了快速测定生活饮用水中二氧化氯的方法——DPD现场测定法,实验证明该方法快速、适用、准确、灵敏度高。

Study on the Method for Rapid Measurement of Chlorine Dioxide in Drinking Water

The reaction product of Chlorine dioxide and N,N-diethyl-p-phenylenediamine（DPD）in water shows pink,20% of chlorine in chlorine dioxide can be transformed into chlorite.The color reaction is proportional to the content of chlorine dioxide in water,the chloride ions in water can be transformed into chlorinated aminoacetic acid by glycine without interference for the measurement of chlorine dioxide.This paper studies the method for rapid determination of chlorine dioxide in drinking water,DPD method,and based on the test results,shows that this method is rapid,applicable,accurate,highly sensitive.