【摘要】 目前我国水体污染严重,化学需氧量(COD)是水质监测中表征有机物的常测项目,是一个重要的水质监测指标,该文综述了COD测定改进方法的发展和研究现状,在指出国标重铬酸钾法不足的基础上,表述了现有测定方法的改进,如消解方法的改进,替代银催化剂的研究,氯离子干扰的消除等。同时介绍了几种与国标法完全不同的COD测定新方法,如光催化氧化法、光催化传感器法、光电催化氧化三电极系统法。更多还原

【Abstract】 At present,water body have been seriously polluted in China.The chemical oxygen demand is regularly-measured item characterizing organic matter in water quality monitoring,and it is also one of the important parameters in water monitoring.Combined with our research works,the status at present and the trends of development for improvement of chemical oxygen demand determination were briefly reviewed.Based on the shortage analysis of normal COD determination,some improvement determination methods were introduced such an improvement method of eliminating,study on the catalyzer which replaced Ag+,elimination of chloride ion interference,etc.And some new methods of COD determination which unlike the normal method,such as photocatalytic oxidation for determination of chemical oxygen demand,Photocatalytic Sensor for Chemical Oxygen Demand Determination,electrolysis-photocatalysis method.更多还原