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Voltammetric Determination of Arsenic with Modified Glassy Carbon Electrode
Electroanalysis ( IF 2.7 ) Pub Date : 2020-01-13 , DOI: 10.1002/elan.201900666 Anamarija Stanković 1 , Žana Kajinić 1 , Jelena Vešligaj Turkalj 2 , Željka Romić 2 , Maja Dutour Sikirić 3 , Abdelilah Asserghine 4 , Geza Nagy 4, 5 , Martina Medvidović‐Kosanović 1
Electroanalysis ( IF 2.7 ) Pub Date : 2020-01-13 , DOI: 10.1002/elan.201900666 Anamarija Stanković 1 , Žana Kajinić 1 , Jelena Vešligaj Turkalj 2 , Željka Romić 2 , Maja Dutour Sikirić 3 , Abdelilah Asserghine 4 , Geza Nagy 4, 5 , Martina Medvidović‐Kosanović 1
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In this study, glassy carbon electrode modified with nano gold‐crystal violet film has been used to detect arsenite (As (III)) in a model system and in groundwater samples. The modified electrode was characterized by scanning electrochemical microscopy (SECM) and electrochemical impedance spectroscopy (EIS). Using voltammetric measuring technique, linear response was obtained in a concentration range of 2.0–22.0 μM. The arsenite concentrations in groundwater samples varied between 2.4 μM to 4.8 μM. The sensitivity of the modified electrode for As (III) detection was 5.6 μA/μM cm2 and 0.8 μM concentration was found as lower limit of detection (LOD). The accuracy of the method was checked with standard method anodic stripping voltammetry (ASV). Groundwater samples were characterized with dynamic (DLS) and electrophoretic (ELS) light scattering measurements which have shown that particles present in different samples differ in size distribution and zeta potential which did not interfere with As (III) detection.
中文翻译：
修饰玻碳电极伏安法测定砷。
在这项研究中，用纳米金-结晶紫膜修饰的玻璃碳电极已用于检测模型系统和地下水样品中的砷（As（III））。通过扫描电化学显微镜（SECM）和电化学阻抗谱（EIS）对改性电极进行表征。使用伏安测量技术，可以在2.0–22.0μM的浓度范围内获得线性响应。地下水样品中的砷含量在2.4μM至4.8μM之间变化。修饰电极对As（III）的检测灵敏度为5.6μA/μMcm 2发现浓度为0.8μM作为检测下限（LOD）。用标准方法阳极溶出伏安法（ASV）检查方法的准确性。地下水样品通过动态（DLS）和电泳（ELS）光散射测量进行了表征，这些测量表明存在于不同样品中的颗粒的大小分布和zeta电位不同，不会干扰As（III）的检测。
更新日期：2020-01-13
中文翻译：
修饰玻碳电极伏安法测定砷。
在这项研究中，用纳米金-结晶紫膜修饰的玻璃碳电极已用于检测模型系统和地下水样品中的砷（As（III））。通过扫描电化学显微镜（SECM）和电化学阻抗谱（EIS）对改性电极进行表征。使用伏安测量技术，可以在2.0–22.0μM的浓度范围内获得线性响应。地下水样品中的砷含量在2.4μM至4.8μM之间变化。修饰电极对As（III）的检测灵敏度为5.6μA/μMcm 2发现浓度为0.8μM作为检测下限（LOD）。用标准方法阳极溶出伏安法（ASV）检查方法的准确性。地下水样品通过动态（DLS）和电泳（ELS）光散射测量进行了表征，这些测量表明存在于不同样品中的颗粒的大小分布和zeta电位不同，不会干扰As（III）的检测。
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