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首页> 外文期刊>Polymer bulletin >Comparison of plain and indoline modified mercury film electrodes for determination of lead, cadmium and copper in urine samples by anodic stripping voltammetry
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Comparison of plain and indoline modified mercury film electrodes for determination of lead, cadmium and copper in urine samples by anodic stripping voltammetry

机译：阳极剥离伏安法测定尿液样品中铅，镉和铜的铅和吲哚改性汞膜电极的比较

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摘要

The objective of this work is to assess response characteristics of conventional mercury film (MFE) and (poly)indoline modified mercury film electrodes (ICMFE) in determination of Cu, Pb and Cd ions by voltammetric stripping analysis. Parameters regarding to mercury and polymer film formations (such as potential, electrochemical mode chosen for film growth, polymer and mercury film thicknesses) and supporting electrolyte type and pH in stripping analysis were thoroughly studied, and conditions providing the highest and most stable responses for the three test metal ions were determined for both electrode types. Performances of the electrodes were evaluated in terms of sensitivity and selectivity in both synthetic aqueous solutions and urine samples. Responses at ICMFE were invariably much lower compared to that obtained at plain MFE. Decomposition of urine samples by hot mineral acid gave rise to enhanced responses at both electrodes. However, ICMFE always exhibited negative selectivity toward Cd even in acid decomposed urine samples. Reliability of the concentration values calculated by the method of standard addition in complex matrices, such as urine, was discussed comprehensively on statistical basis.
机译：本作作品的目的是评估常规汞膜（MFE）和（聚）吲哚改性的汞膜电极（ICMFE）的响应特性，用于通过伏安汽提分析测定Cu，Pb和Cd离子的测定。彻底研究了关于汞和聚合物膜形成的参数（例如用于薄膜生长，聚合物和汞膜厚度的电化学模式）和剥离分析中的电解质类型和pH值，提供了最高和最稳定的响应的条件为两个电极类型测定三个测试金属离子。在合成水溶液和尿液样品中的敏感性和选择性方面评价电极的性能。与在普通MFE上获得的相比，ICMFE的反应总是低得多。通过热无酸的尿液样品的分解产生了两个电极的增强响应。然而，即使在酸分解的尿液样本中，ICMFE也始终表现出对Cd的负选择性。通过统计基础全面讨论通过在诸如尿样的复杂矩阵中的标准添加方法计算的浓度值的可靠性。

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