摘要
化学耗氧量（简称COD）是水质综合评价的一项重要指标,测定废水COD的传统方法为重铬酸盐法,但其操作繁琐、不够安全.本文以传统法为基础,研究采用新型消解装置（程序控温石墨消解仪）消解样品,硫酸亚铁铵滴定法测定废水中的COD,并与传统法进行了对照测定实验,获得了满意的分析结果.方法检出限为3.2 mg/L,相对标准偏差为4.0％,回收率为94.9％～105％.
Chemical oxygen demand （COD） is an important guideline which comprehensively estimates the quality of water. The operation of traditional potassium dichromate method （GB 11914-1989） is tedious and unsafe. A series of tests were processed in measuring the COD in wastewater using the Graphite-digestion instrument compared with the traditional method. Different digestion time and temperature are discussed in this paper. The result shows it can attain precision and accuracy of COD analysis request. The method is deserved to apply. The method detection limit is 3.2mg/L, RSD is 4.0%, the rate of recovery is 94.9%-105%.
出处
《能源环境保护》
2013年第5期18-20,29,共4页
Energy Environmental Protection
关键词
石墨消解
COD
废水
Graphite-digestion
COD
Wastewater
