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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 Pb and Cu 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, Pb and Cu were simultaneously determined with linear range of 1-100 μg/L for Pb and 10-100 μg/L for Cu, respectively. The limits of detection were determined to be 0.4 μg/L and 5.4 μg/L for Pb and Cu, 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11397832 | PMC |
| http://dx.doi.org/10.3390/s24175745 | DOI Listing |
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