钙离子干扰下锰(Ⅱ)测定分析方法探讨  

The Discussion on the Calcium Ion Interference in Manganese(Ⅱ) Determination and Analysis Method

作　　者：孟俊利[1,2] 周长波[1] 彭晓成[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]中国矿业大学(北京),北京100083

出　　处：《中国锰业》2009年第3期29-31,共3页China Manganese Industry

基　　金：中国环境科学研究院中央级公益性科研院所基本科研业务专项(2009KYY209)

摘　　要：电解锰废水中,钙往往与锰共存,采用高碘酸钾分光光度法(GB/T 11906-1989)对锰(Ⅱ)浓度进行测定时,钙离子存在对锰(Ⅱ)测定的干扰较大,从而影响测定结果。为避免钙离子的干扰,采用过滤和静置24 h的方法在不同的钙离子浓度下,对锰(Ⅱ)测定方法进行实验和探讨。结果表明:钙离子的干扰界限浓度为240 mg/L,超过该干扰界限浓度,采用过滤和静置24 h的方法,测定结果与真实值趋于一致。In the electrolysis manganese waste water, calcium is often coexisted with manganese. When high iodate potassium spectro-photometric method is used to carry on the determination to manganese（Ⅱ）concentration, calcium ion can be interferenced in the determination. In order to avoid the interference, this paper discusses the determination method of manganese（ Ⅱ ）under the interference of different calcium ion concentration. The experimentation result shows that the interference boundary of calcium ion＇ s concentration is 240 mg/L. When surpasses this interference boundary, we use the method of filtration or laying it aside for 24 h. The determination result tends to be consistent with the real value.

关 键 词：锰(Ⅱ) 钙离子 干扰 测定方法 

分 类 号：X830.2[环境科学与工程—环境工程]