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首页> 外文期刊>Journal of the Korean Chemical Society >Determination of Traces of meso-2,3-Dimercaptosuccinic Acid by Differential Pulse Cathodic Stripping Voltammetry
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Determination of Traces of meso-2,3-Dimercaptosuccinic Acid by Differential Pulse Cathodic Stripping Voltammetry

机译:差示脉冲阴极溶出伏安法测定痕量的meso-2,3-二巯基琥珀酸

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Cyclic voltammogram of meso-2,3-dimercaptosuccinic acid(DMSA) has two redox peaks. The potential difference between the two peaks is very small(Ep1=-0.64 V; Ep2=-0.68 V). In the absence of Cu(¥±), the cathodic peak is more effective for trace analysis of DMSA, while the mono thiol compound is more effective in the presence of Cu(¥±). The present study also describes the differential pulse cathodic stripping voltammetric method for the determination of DMSA. The followings were optimum condition for the study: 0.015 M borate buffer solution(pH 10.0); an accumulation potential of -0.2V(vs. Ag/AgCl); accumulation time of 120 sec; scan rate of 5 mV/sec. The detection limit of trace analysis shows 3.6 ?? 10-9 M of DMSA at the optimum condition.
机译:meso-2,3-二巯基琥珀酸(DMSA)的循环伏安图具有两个氧化还原峰。两个峰之间的电势差很小(Ep1 = -0.64 V; Ep2 = -0.68 V)。在没有Cu(¥±)的情况下,阴极峰对DMSA的痕量分析更有效,而单硫醇化合物在Cu(¥±)的存在下更有效。本研究还描述了差分脉冲阴极溶出伏安法测定DMSA。以下是本研究的最佳条件:0.015 M硼酸盐缓冲溶液(pH 10.0);累积电位为-0.2V(vs.Ag/AgCl);累积时间为120秒;扫描速度为5 mV /秒。痕量分析的检出限为3.6 DMSA在最佳条件下为10-9M。

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