有效氯含量测定的试纸法与滴定法的比较

COMPARISON OF IODOMETRY AND TEST PAPER FOR MEASURING AVAILABLE CHLORINE CONTENT

利用碘化钾遇有效氯可被氧化成游离碘而显色的原理,制成测有效氯含量指示卡,并与化学滴定法进行比较。结果,两种方法测同一浓度有效氯总符合率大于90％,符合《消毒技术规范》规定的要求,可用于含氯消毒剂溶液的有效氯含量快速测定。

In order to make indicator card for measuring available chlorine, reaction colour of potassium iodide and available chlorine was used, and iodometry and the indicator card were compared. The results showed that total coincidence rate of the two methods for measuring available chlorine content was >90%. The result indicated that the test paper fulfilled the requirement of 'Disinfection Technical Guidelines', and it could be applied in measuring available chlorine.