化学耗氧量铬法和锰法的对比分析  

Compare and Analysis of Two Methods of COD Cr and Mn

作　　者：张颖清 

机构地区：[1]山西省大同市供水排水集团有限责任公司水质处,山西大同037006

出　　处：《广东化工》2012年第17期138-138,161,共2页Guangdong Chemical Industry

摘　　要：对化学耗氧量铬法与锰法的应用情况进行对比分析，为今后的实践应用提供可靠的参考依据。随机抽取当地具有一定纳污功能的地表河流中上游清洁断面和下游污染断面水样，每天采集1次，共采集5天，所抽取水样分别采用铬法和锰法进行检测，并对这两种检测方法的检测结果进行对比分析。经研究发现，两种检测方法间存在明显的相关性，且在50---400mg／L间铬法具有较好的线性关系，在0．5--4．5mg／L间锰法具有较好的线性关系；铬法更加适用于工业废水以及生活污水的测定，而锰法则更加适用于地F水和净化处理后的地表水的测定。The application of two methods of COD Cr and Mn is contrasted to provide a reliable reference for future practical application. The water samples were collected random once everyday for total 5 days, in the upstream cleaning section and downstream pollution section of a local surface river. Then the water samples were detected with the two methods of COD Cr and COD Mn, and the detection results were compared and analyzed. It turned out that two kinds of detection method had an obvious correlation, and in 50mg/L-400mg/L chrome method has good linear relation, in 0.5,-4.5 mg/L Mn method bad good linear relation. Conclusion the study found, Cr method was more suitable for industrial wastewater and domestic sewage in the determination of manganese, and law was more suitable to the groundwater and surface water after purification determination.

关 键 词：化学耗氧量 铬法 锰法 对比分析 相关性 

分 类 号：O65[理学—分析化学]