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首页> 外文期刊>Electroanalysis >Determination of trace amounts of copper in tap water samples with a calix[4]arene modified carbon paste electrode by differential pulse anodic stripping voltammetry
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Determination of trace amounts of copper in tap water samples with a calix[4]arene modified carbon paste electrode by differential pulse anodic stripping voltammetry

机译：杯[4]芳烃修饰的碳糊电极通过差分脉冲阳极溶出伏安法测定自来水样品中的痕量铜

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A calix[4]arene modified carbon paste electrode was used for trace determination of copper. The study of the preconcentration of copper as well as the other heavy metal ions at the modified electrode, with subsequent measurement by differential pulse anodic stripping voltammetry (DPASV), indicates the efficient open-circuit accumulation of the analytes onto the electrode. Many parameters such as the composition of the paste, pH, preconcentration time and stirring rate influence the response of the measurement. The procedure was optimized for copper determination. For a 10-minute preconcentration time at pH 6.5 - 7.5, the detection limit (LOD) was 1.1 mu g L-1. The optimized method was successfully applied to the determination of copper in tap water sample by means of standard addition procedure. The copper content of the sample was comparable with the result obtained with AAS method.
机译：杯[4]芳烃改性的碳糊电极用于痕量铜的测定。对铜以及其他重金属离子在修饰电极上的预富集的研究以及随后通过差分脉冲阳极溶出伏安法（DPASV）进行的测量表明，分析物在电极上的有效开路累积。糊的组成，pH，预浓缩时间和搅拌速率等许多参数都会影响测量的响应。该程序针对铜的测定进行了优化。在pH 6.5-7.5的10分钟预浓缩时间内，检出限（LOD）为1.1μg L-1。该优化方法已成功地通过标准添加程序用于自来水样品中铜的测定。样品中的铜含量与AAS方法获得的结果相当。

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