Fast Zinc determination using commercial screen-printed carbon electrodes modified with bismuth nanostructures via pulsed electrodeposition

IF 3.7 Q1 CHEMISTRY, ANALYTICAL

Talanta Open Pub Date : 2025-05-25 DOI:10.1016/j.talo.2025.100485

A. Rubino , R.B. Queirós

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Abstract

Electroanalytical devices based on screen-printed electrodes (SPEs) present a portable and cost-effective alternative to traditional laboratory analytical methods for detecting metal ions. This study investigates the development and application of commercially available screen-printed carbon electrodes (SPCEs) modified with Bi nanostructures for the detection of Zn in water/wastewater samples. By the application of pulsed electrodeposition (PED), Bi nanostructures are effectively anchored to the carbon-based working electrode of the screen-printed device (Bi-nano/SPCEs). The performance of those modified electrodes in Zn sensing was assessed using differential pulse voltammetry (DPV) in “drop-on-a-chip” configuration. Evaluations conducted with both standard solutions and real wastewater samples reveal that the electroanalytical device based on Bi-nano modified SPCEs exhibit promising sensitivity (1.21 μA cm^-2 μg/L^-1; 0.018 μA cm^-2 μM^-1) and repeatability (RSD < 10 %) with LOD and LOQ of 4.86 and 12.21 μg/L Zn(II), respectively (i.e., 0.075 and 0.188 μM), contextually guaranteeing rapid analysis (≤ 60 s) and high versatility in real samples analysis.

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用铋纳米结构修饰的丝网印刷碳电极脉冲电沉积法快速测定锌

基于丝网印刷电极（spe）的电分析装置为传统的实验室分析方法检测金属离子提供了一种便携且经济高效的替代方法。本研究研究了商业上可用的铋纳米结构修饰的丝网印刷碳电极（spce）的开发和应用，用于检测水/废水样品中的锌。通过脉冲电沉积（PED）的应用，铋纳米结构有效地固定在丝网印刷器件（Bi-nano/ spce）的碳基工作电极上。采用差分脉冲伏安法（DPV）对这些修饰电极在锌传感中的性能进行了评估。对标准溶液和实际废水样品的评价表明，基于双纳米修饰的spce的电分析装置具有良好的灵敏度(1.21 μA cm-2 μg/L-1；0.018 μA cm-2 μM-1)，重复性(RSD <；10%)， LOD和LOQ分别为4.86和12.21 μg/L Zn(II)（即0.075和0.188 μM），保证了快速分析（≤60 s）和在实际样品分析中的高通用性。

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