This paper discusses in detail that coulometry quickly measures chemical oxygen demand of low polluted domestic sewage of the school and high polluted industrial sewage.
2
本文提出了一种以重铬酸钾为氧化剂在新的条件下快速及准确测定化学耗氧量（COD）的方法。
A method for the rapid and accurate determination of chemical oxygen demand (COD) using potassiumdichromate as oxidant under new conditions is described in this paper.
3
用分光光度法测定水中的化学耗氧量简便快捷，减小了误差，提高了精度。
Its simple and quick to measure the COD of wasted water with the spectrophotometer, which error was reduced and accuracy was improved.
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