有效去除Cl-干扰的CODcr测定方法探讨

The methods of CODcr determination to wipe off Cl- interference

在CODcr测定中，如何有效地去除Cr的干扰，一直是个热点研究课题。介绍一种建立在标准方法基础上的分析方法，采用K2Cr2O7溶液为氧化剂，以HgSO4-H2SO4为掩蔽剂，对高浓度[Cl^-]〉5000mg／L的水样辅以稀释测试，取得了一致性和可靠性均很好的分析结果。

Introduces analytical method based on standard method, adopts K2Cr2O7l liquor as oxidizer, uses HgSO4- H2SO4 as wasking agent, dilutes and tests water sample of high concentration, gets the results of good coherence and reliability.