高氯离子废水中低COD测定方法的探讨

对国标法重铬酸钾法、低浓度氧化剂法、反应器消解法3种方法测定高氯离子废水中低浓度有机物进行比较,并进行精密度、准确度分析。结果表明,低浓度氧化剂法、反应器消解法测定结果准确性高,重现性好,是实验室及污水处理厂等企业测定高氯离子废水中CODCr浓度的可行方法。

Discussion on determination methods of COD concentration in wastewater containing high chloride

Three determination methods of low concentration organic matters concentration in wastewater containing high chloride: potassium dichromate method of national standard,low-concentration oxidant method,dichromate reactor digestion-spectrophotometric method were compared and analyzed from the aspects of precision and accuracy.The results showed that,low-concentration oxidant method and dichromate reactor disgestion-spectrophotometric method had the characteristics of high accuracy and good reproducibility,which were suitable to be used for CODCr concentration determination of high chloride-containing wastewater in laboratory,sewage treatment plant and some other enterprises.