水中化学需氧量检测方法研究进展

Research Progress on Detection Methods of Chemical Oxygen Demand in Water

指出了化学需氧量COD(Chemical Oxygen Demand)是以化学方法测量水样中需要被氧化的还原性物质的量,结果折算成氧的量(以mg/L表示)。总结了近年来水中测定化学需氧量的研究进展及现状,对氧化还原滴定法、分光光度法、电化学法、流动注射法等方法进行了综述,分析了各检测方法的特点,展望了化学需氧量测定方法的发展趋势。

The value of COD(chemical oxygen demand)is defined as thenumber of oxygen equivalents consumed in the oxidation of organic compounds bystrong oxidizing agents(mg/L).It was reviewed and summarized of detection methods of chemical oxygen demand(COD)in water.Thereview involves the development of the oxidation-reduction titration method,spectrophotometry method,electrochemical method and flow injection method.Meanwhile,it has wide application prospect and further research value.