Li Yongfang, Chen Xuan, Yuan Zhiyong, Yi Zhijian, Wang Zijun, Wang Rui
School of Food Science and Engineering, Foshan University, Foshan 528231, China.
Human Phenome Institute, State Key Laboratory of Genetic Engineering, Fudan University, Shanghai 200438, China.
Sensors (Basel). 2024 Sep 4;24(17):5745. doi: 10.3390/s24175745.
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.
在本研究中，通过动态氢气泡模板（DHBT）法将纳米多孔金（NPG）沉积在丝网印刷碳电极（SPCE）上，以制备用于通过方波阳极溶出伏安法（SWASV）同时测定Pb和Cu的电化学传感器。对制备NPG/SPCE的电沉积电位和电沉积时间进行了深入研究。扫描电子显微镜（SEM）和能量色散X射线衍射（EDX）分析证实了NPG修饰电极的成功制备。电化学表征表明，与裸电极和纳米金修饰电极相比，其具有优异的电子转移能力。经过全面优化，Pb和Cu的线性测定范围分别为1-100μg/L和10-100μg/L，Pb和Cu的检测限分别确定为0.4μg/L和5.4μg/L。该方法为饮用水中重金属的测定提供了宽线性检测范围、低检测限和良好的可靠性。这些结果表明，NPG/SPCE在环境和食品应用中具有巨大潜力。
