关于高氯废水COD分析的多种方法的比对

本实验采用氯气校正法和低浓度重铬酸钾氧化法来分别测定高氯废水的COD值，两种方法主要针对氯离子浓度小于8000mg／l，COD值小于110mg／l的水样进行分析。试验结果表明：采用氯气校正法虽然可行，但是实验装置复杂，可控性差，数据结果精密度差，准确度不高；采用低浓度重铬酸钾氧化法进行高氯废水的coD测定，结果较为准确，且操作同国家标准法（GB11914—89）基本一致，操作过程简单可行，实用价值高。

omparison of High Chlorine Wastewater COD Determination Methods

In this experiment, COD in high chlorine waste water was detected by the chlorine rectification method and low concentration potassium dichromate method. The two methods are designed mainly for samples whose chloride concentration is less than 8000mg/1 and COD is less than 110mg/1. The results showed that although the chlorine rectification method was feasible, it has a lot of disadvantages, including complex experimental setup, hard to control, low precision and accuracy. As a national standard method, the potassium dichromate method is simple and feasible with good accuracy, therefore it is recommended to use potassium dichromate method in application.