示波极谱滴定法测定水和废水中的溶解氧  

Determination of Dissolved Oxygen in Water and Waste Water by Oscillo Polarographic Titration

作　　者：曾英杰[1] 孙保平[2] 侯绍刚[2] 

机构地区：[1]河南省滑县环境保护局,河南滑县456400 [2]安阳大学化工系,河南安阳455000

出　　处：《干旱环境监测》2002年第3期177-179,共3页Arid Environmental Monitoring

摘　　要：在pH值为 6.5的NaAc -HAc底液中 ,加入经处理后的水样 1 0ml,用EDTA标准溶液滴定其中的Mn2 +,以EDTA在示波极谱上的切口到一定深度指示终点 ,废水的色度、浊度等对测定不产生干扰 ,不需进行预处理 ,操作简便、快速。该方法的相对误差小于 1 .0 % ,变异系数小于 0 .7%。The treated 10 ml water sample is added in the solution of natrium acetate and acetic acid whose pH is 6.5,and then titrated it by EDTA standard solution using EDTA slot at the oscillo polarographic as the end point.The chromaticity and turbidity don't disturb determination so there's no need to pretreat it.The operation is easy and rapid.Its standard error is lower than 1.0% and its difference coefficient is lower than 0.7%.

关 键 词：示波极谱滴定法 水 废水 溶解氧 MN^2+ 水质监测 

分 类 号：X832[环境科学与工程—环境工程]