Nanoporous Gold-Modified Screen-Printed Electrodes for the Simultaneous Determination of Pb 2+ and Cu 2+ in Water.

Autor: Li, Yongfang, Chen, Xuan, Yuan, Zhiyong, Yi, Zhijian, Wang, Zijun, Wang, Rui
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Zdroj: Sensors (14248220); Sep2024, Vol. 24 Issue 17, p5745, 14p
Abstrakt: In this study, nanoporous gold (NPG) was deposited on a screen-printed carbon electrode (SPCE) by the dynamic hydrogen bubble template (DHBT) method to prepare an electrochemical sensor for the simultaneous determination of Pb2+ and Cu2+ by square wave anodic stripping voltammetry (SWASV). The electrodeposition potential and electrodeposition time for NPG/SPCE preparation were investigated thoroughly. Scanning electron microscopy (SEM) and energy-dispersive X-ray diffraction (EDX) analysis confirmed successful fabrication of the NPG-modified electrode. Electrochemical characterization exhibits its superior electron transfer ability compared with bare and nanogold-modified electrodes. After a comprehensive optimization, Pb2+ and Cu2+ were simultaneously determined with linear range of 1–100 μg/L for Pb2+ and 10–100 μg/L for Cu2+, respectively. The limits of detection were determined to be 0.4 μg/L and 5.4 μg/L for Pb2+ and Cu2+, respectively. This method offers a broad linear detection range, a low detection limit, and good reliability for heavy metal determination in drinking water. These results suggest that NPG/SPCE holds great promise in environmental and food applications. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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