Green Electroanalytical Approach: Utilizing a New Type of Solid Bismuth Microelectrode Array for Cobalt Determination by Adsorptive Stripping Voltammetry

IF 2.6 3区化学 Q2 CHEMISTRY, ANALYTICAL

Electroanalysis Pub Date : 2026-10-15 DOI:10.1002/elan.70239

Iwona Gęca

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Abstract

This study reports the application of a solid bismuth microelectrode array for the determination of cobalt(II) ions by adsorptive stripping voltammetry (AdSV). The electrochemical properties of the proposed sensor were evaluated, highlighting its eco-friendly nature through the use of nontoxic electrode material. A significant advantage of this procedure is that it requires no surface modification of the working electrode. After optimization of the experimental parameters, including pH of supporting electrolyte, activation conditions, and accumulation potential and time, the sensor exhibited a linear response for Co(II) concentrations ranging from 5 × 10⁻¹⁰ to 1 × 10⁻⁷ mol L⁻¹ (with an accumulation time of 120 s). The limit of detection was equal to 2.2 × 10⁻¹⁰ mol L⁻¹. The repeatability, expressed as relative standard deviation, was 4.7% (n = 5) for a 2 × 10⁻⁸ mol L⁻¹ of Co(II). The developed procedure was successfully validated using certified reference materials and recovery studies in environmental water samples, confirming its suitability for practical analytical applications.

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绿色电分析方法：利用新型固体铋微电极阵列吸附溶出伏安法测定钴

本文报道了固体铋微电极阵列吸附溶出伏安法（AdSV）测定钴离子的应用。对该传感器的电化学性能进行了评估，通过使用无毒电极材料突出了其环保性。该方法的一个显著优点是不需要对工作电极进行表面修饰。通过优化实验参数，包括支持电解质的pH、活化条件、积累电位和时间，传感器对Co（II）浓度在5 × 10−10 ~ 1 × 10−7 mol L−1范围内呈线性响应（积累时间为120 s）。检出限为2.2 × 10−10 mol L−1。对于2 × 10−8 mol L−1的Co(II)，重复性为4.7% (n = 5)，以相对标准偏差表示。开发的程序成功地使用认证的标准物质和环境水样的回收研究进行了验证，确认了其实际分析应用的适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electroanalysis 化学-电化学

CiteScore

6.00

自引率

3.30%

发文量

222

审稿时长

2.4 months

期刊介绍： Electroanalysis is an international, peer-reviewed journal covering all branches of electroanalytical chemistry, including both fundamental and application papers as well as reviews dealing with new electrochemical sensors and biosensors, nanobioelectronics devices, analytical voltammetry, potentiometry, new electrochemical detection schemes based on novel nanomaterials, fuel cells and biofuel cells, and important practical applications. Serving as a vital communication link between the research labs and the field, Electroanalysis helps you to quickly adapt the latest innovations into practical clinical, environmental, food analysis, industrial and energy-related applications. Electroanalysis provides the most comprehensive coverage of the field and is the number one source for information on electroanalytical chemistry, electrochemical sensors and biosensors and fuel/biofuel cells.