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首页> 外文期刊>Electroanalysis >Application of a carbon paste electrode modified with a Schiff base ligand to mercury speciation in water
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Application of a carbon paste electrode modified with a Schiff base ligand to mercury speciation in water

机译：席夫碱配体修饰的碳糊电极在水中汞形成中的应用

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A carbon paste electrode, modified with benzylbisthiosemicarbazone is used for mercury speciation in water samples. Mercury ion is selectively accumulated on the electrode surface at open circuit and its analysis was performed by cyclic voltammetry or square-wave voltammetry (SWV). A detection limit of 8 mu g L-1 (3 sigma) was found for 15 min of accumulation using SWV as measurement technique. The effect of several metallic ions and organic substances on voltammetric signal is examined. For speciation purposes, a ligand competition methodology between ligands in solution and electrode is used. Model mercury complexes are characterized as a function of their dissociation kinetics. The method was applied to mercury speciation in water samples from the Jarama River in Madrid.
机译：用苄基双硫代半脲修饰的碳糊电极可用于水样中的汞形态分析。汞离子在断路时选择性地积聚在电极表面，并通过循环伏安法或方波伏安法（SWV）进行分析。使用SWV作为测量技术，发现15分钟的累积检测限为8μg L-1（3σ）。研究了几种金属离子和有机物质对伏安信号的影响。为了形成物种，使用溶液和电极中配体之间的配体竞争方法。模型汞络合物的特征在于其解离动力学。该方法用于马德里哈拉玛河水样中的汞形态分析。

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