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2003年前,二氧化氯含量测定一直采用2000年版消毒技术规范规定的丙二酸法,测定结果不精确,并且不能区分溶液中的其他成分。2003年以后规定采用2002年版消毒技术规范所提供的五步碘量法。在实际应用中发现,该方法所提供的磷酸盐缓冲液pH值在6.90左右,根据该方法的取样量和缓冲液
Before 2003, the determination of chlorine dioxide has been using the 2000 edition of the malnutrition technology specification malonic acid method, the measurement results are not accurate, and can not distinguish the other components in solution. After 2003, the provisions of the 2002 edition of disinfection techniques provided by the five-step iodometric method. In practical application, it is found that the pH value of the phosphate buffer provided by the method is about 6.90. According to the method, the sample amount and the buffer