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Square Wave‐Anodic Stripping Voltammetric Determination of Copper at a Bismuth Film/Glassy Carbon Electrode Using 3‐[(2‐Mercapto‐Vinyl)‐Hydrazono]‐ 1,3‐Dihydro‐Indol‐2‐One
Electroanalysis ( IF 2.7 ) Pub Date : 2018-04-26 , DOI: 10.1002/elan.201800092
Eman A. Al-Harbi 1 , Mohammad S. El-Shahawi 2
Affiliation  

This study reports a highly sensitive electrochemical sensor based on Bi film modified glassy carbon electrode (BiF/GCE) for total determination and speciation trace concentrations of copper(II) ions in environmental water samples. Square wave‐adsorptive anodic stripping voltammetric (SW‐ASV) experiment was performed for monitoring selective accumulation of copper(II) with reagent 3‐[(2‐mercapto‐vinyl)‐hydrazono]‐1,3‐dihydro‐indol‐2‐one (MHDI) at pH 9–10. The mechanism of the electrode reaction of Cu2+‐MHDI complex was safely assigned. The sensor exhibited a wide linear range (3.22×10−9–2.0×10−7 mol L−1) with lower limits of detection (LOD) and quantitation (LOQ) of 9.6×1−10 and 3.22×10−9 mol L−1, respectively (R2=0.9993). The proposed sensor exhibited interference from active metal ions e. g. Cd, Hg. The performance of the proposed method was compared successfully with most of the reported methods and comparable efficiencies were obtained. The analytical utility of the proposed SW‐ASV method has been successfully validated for trace analysis of copper(II) in environmental water samples. The method offers a precise, accurate approach with good reproducibility, robustness, ruggedness, and cost effectiveness.

中文翻译:

使用3-[((2-巯基乙烯基)-Hydrazono] -1,3-二氢-吲哚-2-One的方波阳极溶出伏安法测定铋膜/玻璃态碳电极上的铜

这项研究报告了一种基于Bi膜修饰的玻碳电极(BiF / GCE)的高灵敏度电化学传感器,用于环境水中样品中铜(II)离子的总含量和形态痕量浓度。进行方波吸附阳极溶出伏安(SW‐ASV)实验,以监测试剂3 ‐ [[(2-巯基乙烯基)‐肼基] -1,3-二氢吲哚‐2‐对铜(II)的选择性积累pH值为9-10时为一(MHDI)。安全地确定了Cu 2+ -MHDI络合物的电极反应机理。该传感器具有宽线性范围(3.22×10 -9 –2.0×10 -7  mol L -1),检测下限(LOD)和定量下限(LOQ)分别为9.6×1 -10和3.22×10 -9分别为 mol L -1(R 2= 0.9993)。所提出的传感器表现出来自活性金属离子e的干扰。G。镉,汞 所提出的方法的性能已与大多数已报道的方法成功地进行了比较,并获得了可比的效率。所建议的SW‐ASV方法的分析实用程序已成功验证了用于环境水样品中痕量铜(II)的分析。该方法提供了一种精确,准确的方法,并具有良好的可重复性,鲁棒性,耐用性和成本效益。
更新日期:2018-04-26
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