摘要
对ＣＯＤ重铬酸钾回流法中的主要干扰离子，氯化物的消除，选择了用硫酸银代替硫酸汞做掩蔽剂。通过对比实验，分析结果无显著差别。回收率在９５％～１０６％之间。对ＣＯＤ废液中的硫酸银，采用铁线置换法回收金属银，进行循环使用，降低了分析费用，减小了环境污染。
To remove main disturbing ion,chlorine ion in the COD potassium dichromate reflux method,silver sulfate replaces mercury sulfate as a screening agent.By comparing experiments,their analysis results of two screening agents are almost the same.Its recovery ratio is 95%～106%.Iron line replacement method is used to recovery metal silver from silver sulfate in COD waste liquid,and it is reused to analyze,so analysis cost and environment pollution are decreased.
出处
《石油化工环境保护》
1998年第3期62-64,共3页
Environment Protection in Petrochemical Industry
