重铬酸盐法与HACH微回流法测定水中化学需氧量的对比实验

Comparison of Dichromate Method and HACH Micro-reflux Method for Determination of Chemical Oxygen Demand in Water

摘要: 经过对比实验,发现重铬酸盐法测定COD准确度高,精密度高;HACH微回流法测定COD,对于清洁的地表水准确度高,精密度高,但是对于污水的测定精密度不高,不适用于污水的测定。

Abstract: Through comparative experiments, it was found that the dichromate method had high accuracy and precision in the determination of COD. The HACH micro-reflux method for the determination of COD has high accuracy and precision for clean surface water, but low precision for the determination of sewage, so it is not suitable for the determination of sewage.