Korolczuk Mieczyslaw, Gęca Iwona, Mrózek Paulina
Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Sklodowska University, 20-031 Lublin, Poland.
Molecules. 2025 Jun 26;30(13):2743. doi: 10.3390/molecules30132743.
A new type of solid bismuth microelectrode array characterized by eco-friendly properties and the simplicity of its construction is presented for the first time. The proposed array of microelectrodes consists of exactly forty-three single capillaries of an inner diameter of about 10 µm filled with metallic bismuth and packed in one casing. The proposed sensor is reusable thanks to its distinctive design. The microelectrode properties of the proposed working electrodes were confirmed by comparing the analytical signals of cadmium and lead recorded from stirred and unstirred solutions during the deposition step. The practical application of the solid bismuth microelectrode array is presented by detailing the procedure for the simultaneous determination of Pb and Cd by anodic stripping voltammetry. The calibration graphs were linear from 5 × 10 to 2 × 10 mol L and 2 × 10 to 2 × 10 mol L for Cd(II) and Pb(II), respectively (deposition time of 60 s). The detection limits for Cd(II) and Pb(II) were equal to 2.3 × 10 mol L and 8.9 × 10 mol L, respectively. Potential interferences were investigated. The developed procedure was successfully used for the analysis of certified water reference material and environmental water samples.
首次提出了一种新型的固体铋微电极阵列，其特点是具有环保特性且结构简单。所提出的微电极阵列由内径约为10 µm的43根单毛细管组成，这些毛细管填充有金属铋并封装在一个外壳中。所提出的传感器因其独特的设计而可重复使用。通过比较沉积步骤中在搅拌和未搅拌溶液中记录的镉和铅的分析信号，证实了所提出的工作电极的微电极特性。通过详细介绍阳极溶出伏安法同时测定铅和镉的程序，展示了固体铋微电极阵列的实际应用。镉（II）和铅（II）的校准曲线分别在5×10至2×10 mol/L和2×10至2×10 mol/L范围内呈线性（沉积时间为60 s）。镉（II）和铅（II）的检测限分别为2.3×10 mol/L和8.9×10 mol/L。研究了潜在干扰。所开发的程序成功用于分析有证水标准物质和环境水样。
