《水样中COD的测定》实验综述报告

Experimental Summary Report of Determination of COD in Water Samples

本文主要综述了水样中COD的三种常用测定方法:重铬酸钾法、高锰酸钾法和电化学法。同时通过对三种测定方法进行比较:重铬酸钾法可以氧化绝大部分有机物,但其有耗时长和产生二次污染的不足;高锰酸钾法氧化能力有限,可测定含低浓度简单有机物的水样;电化学法测定速度快,无二次污染,合成适宜的电极材料的合成是提高其应用范围的关键。

This study summarized three commonly used determination methods of COD in water samples:Method of Potassium dichromate oxidation,Method of Potassium permanganate oxidation and Method of Electrochemical.The most of organic compounds can be oxidized with the method of potassium dichromate oxidation.But the lacks of this method are time consuming and secondary pollution.The ability of method of potassium permanganate oxidation is limited.Water samples containing low concentrations of simple organic compounds can be determined.The method of electrochemical is fast and has no secondary pollution,but synthesis of suitable electrode materials is the key to improve the range of application.