School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China.
School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China; China-Singapore International Joint Research Institute, Guangzhou Knowledge City, Guangzhou 510663, People's Republic of China.
Food Chem. 2024 Dec 1;460(Pt 2):140450. doi: 10.1016/j.foodchem.2024.140450. Epub 2024 Jul 14.
In this work, a carbon felt (CF) was utilized to fabricate electrochemical sensors for the simultaneous detection of Cd, Pb and Hg. The working conditions of CF sensors including thermal activation, electrolytes, and enrichment potentials and times were systematically investigated. Under the optimal detection conditions, the resulting sensors showed good linearity in the concentration ranges of 3-10,000, 2-10,000 and 5-10,000 μg/L for the detection of Cd, Pb and Hg, corresponding to the detection limits of 1, 0.5, and 1 μg/L, respectively. Meanwhile, the resulting electrochemical sensor demonstrates excellent reproducibility and anti-interference. In addition, the CF electrodes maintain good stability even after 180 days of storage at room temperature. In real water, rice and milk samples, the CF electrodes have been successfully utilized for the detection of Cd, Pb and Hg and the results were in agreement with those obtained from the inductively coupled plasma mass spectrometry.
在这项工作中，我们利用碳纤维毡（CF）来制备电化学传感器，用于同时检测 Cd、Pb 和 Hg。我们系统地研究了 CF 传感器的工作条件，包括热激活、电解液、富集电位和时间。在最佳检测条件下，所得传感器对 Cd、Pb 和 Hg 的检测浓度范围分别为 3-10000、2-10000 和 5-10000μg/L，检出限分别为 1、0.5 和 1μg/L。同时，所得电化学传感器具有优异的重现性和抗干扰性。此外，CF 电极即使在室温下储存 180 天后仍保持良好的稳定性。在实际水样、大米和牛奶样品中，CF 电极已成功用于 Cd、Pb 和 Hg 的检测，结果与电感耦合等离子体质谱法的结果一致。
