摘要
化学需氧量是测定水中有机物质含量的重要指标之一[1]。我们现阶段一般用分光光度法和重铬酸盐法。本文主要讲述的是分光光度法测定水中化学需氧量。对在150℃相同的温度下不同的时间测水中4个不同浓度化学需氧量的探讨。以及将HJ828-2017水质化学需氧量的测定重铬酸盐法与EPA 410.4-1993水质化学需氧量的测定分光光度法美国国家环保局方法进行比较。两种方法的优缺点的探讨。
Chemical oxygen demand(COD) is one of the important indexes for the determination of organic substances in water. Spectrophotometry and dichromate are currently used. The chemical oxygen demand in water was determined by spectrophotometry. The chemical oxygen demand(COD) of four different concentrations in water at the same temperature of 150 ℃ at different times was discussed. HJ828-2017 water quality chemical oxygen demand determination dichromate method and EPA 410.4-1993 water quality chemical oxygen demand determination spectrophotometric method were compared. The advantages and disadvantages of the two methods were discussed.
作者
吴彩红
吴思慧
WU Cai-hong;WU Si-hui(Environmental Monitoring Station of Qingpu District,Shanghai 201700,China)
出处
《广州化工》
CAS
2020年第8期83-85,共3页
GuangZhou Chemical Industry
关键词
化学需氧量
分光光度法
重铬酸盐法
消解时间
chemical oxygen demand
spectrophotometry
dichromate process
digestion time