高锰酸盐指数三种测定方法的比较

Comparison Permanganate Index of Three Kinds of Measurement Method

比较了高锰酸盐指数的三种不同测定方法。结果表明:经典酸性高锰酸钾滴定法结果准确度高,但操作繁琐;电位滴定法,精密度和准确度较高,但一次只能滴定一个样品;HACH TNT试管法操作简便,但样品的准确度不够好。

This study compares permanganate index of three different measurement methods. The practice shows that the classical potassium permanganate titration methods the results with high accuracy, but the operation is complicated, the potentiometric titration method the results with high accuracy and precision, but only one sample of a titration, the HACH TNT test tube method easy to operate, but the sample accuracy is not good enough.