影响高锰酸盐指数样品考核空白值测试结果准确性的因素研究与控制

Research and Control of Factors Affecting the Accuracy of Blank Value Test Results of Permanganate Index Samples

采用酸性高锰酸钾滴定法对水中高锰酸盐指数进行测定,严格控制各种条件,分析和讨论了溶液加热反应时间与温度等因素对测定结果产生的影响。就存在原因及如何解决这些因素的影响做出研究与控制。

Permanganate index is a common index to reflect the pollution of organic and inorganic oxidizable substances in water,and the reaction conditions must be strictly mastered in the ability verification and assessment of national laboratories.Standard substance,heating time and temperature,test sample sampling amount,titration speed,end point,K value and test sample water level height,and the elimination of blank value in calculation are the key factors affecting the accuracy of test results.How to solve these factors and research and control.