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Determination of traces of cobalt in zinc matrix by catalytic adsorptive stripping voltammetry at bismuth film electrode

机译:铋膜电极催化吸附伏安法测定锌基体中痕量钴。

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摘要

An catalytic adsorptive stripping voltammetric procedure for the determination of cobalt in a zinc matrix at an in situ plated bismuth film electrode was described. The procedure exploits the enhancement effect of a cobalt peak observed in the system Co(II)-dimethylglyoxime-piperazine-1,4-bis(2-ethanesulfonic acid) -cetyltrimethylammonium bromide. Using optimized conditions, in a solution containing 0.01 mol L-1 Zn(II) the calibration plot for Co(II) following accumulation time of 120 s was linear from 2 x 10(-10) to 5 x 10(-8) mol L-1. The detection limit (based on 3 sigma criterion) for Co(II) of 6 x 10(-11) mol L-1 was achieved. The proposed procedure was applied for Co(II) determination in zinc reagent for analysis and in tap water.
机译:描述了一种催化吸附溶出伏安法,用于在原位镀铋膜电极上测定锌基质中的钴。该方法利用了在Co(II)-二甲基乙二肟-哌嗪-1,4-双(2-乙磺酸)-十六烷基三甲基溴化铵中观察到的钴峰的增强作用。在优化的条件下,在含有0.01 mol L-1 Zn(II)的溶液中,累积120 s后Co(II)的校正图在2 x 10(-10)到5 x 10(-8)mol之间呈线性关系L-1。 Co(II)的检出限(基于3 sigma标准)为6 x 10(-11)mol L-1。拟议的程序用于分析锌试剂和自来水中的Co(II)测定。

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