摘要
测定化学耗氧量的标准方法重铬酸钾法的主要缺点是：测定时间长；使用汞盐消除C1-的干扰，二次污染严重．提出了改进意见．改进后的方法，测定时间短，并提出了彻底消除Cl-干扰的方法，其精密度和准确度较高．
The standard method of measuting COD with K2Cr2O7 has the following disadvantages,long mea-suring time,and the serious second pollution occured. When mercuric salt eliminated the interference of Cl-. This paper introduced its improvement. The improved method can shorten the measuring time and eliminate the interference of Cl-. The new method has high precision and accuracy.
出处
《石油化工环境保护》
1997年第3期49-51,共3页
Environment Protection in Petrochemical Industry
