Elamin Manahil Babiker, Chrouda Amani, Ali Shazalia Mahmoud Ahmed, Alhaidari Laila M, Jabli Mahjoub, Alrouqi Rahaf Mutlaq, Renault Nicole Jaffrezic
Department of Chemistry, Faculty of Science Al-Zulfi, Majmaah University, 11952, Saudi Arabia.
Institute of Analytical Sciences, UMR CNRS-UCBL-ENS 5280, 5 Rue la Doua, 69100, Villeurbanne, CEDEX, France.
Heliyon. 2024 Feb 15;10(4):e26364. doi: 10.1016/j.heliyon.2024.e26364. eCollection 2024 Feb 29.
The key solution to combat trace metal pollution and keep the environment, ecosystem, animals, and humans safe is earlier and rapid trace metal detection. For all these reasons, we propose in this work the design of a simple electrochemical sensor functionalized with green nanoparticles for electrochemical detection of the fourth most dangerous heavy metal ions namely copper, zinc, lead, and mercury. The green nanoparticles are fabricated by a one-step, consisting of reducing platinum nanoparticles by a natural gum Arabic polymer. To guarantee the success of these nanoparticles' design, the nanoparticles have been characterized by Fourier-transform infrared spectroscopy FTIR, and thermogravimetric TGA techniques. While, for the electrochemical characterization, we have adopted cyclic voltammetry CV and electrochemical impedance spectroscopy EIS to control different steps of surface modification, and the differential pulse anodic stripping DPAS was monitored to follow up the electrochemical detection of different heavy metals.
have confirmed the good chemical and physical properties of the elaborated nanoparticles. As, the developed sensor showed a specific electrochemical response toward the heavy metal ions separately, with a lower limit of detection lower LOD than that recommended by the World Health Organization, in order of 9.6 ppb for Cu, 1.9 ppb for Zn, 0.9 ppb for Hg, and 4.2 ppb for Pb. Impressively, the elaborated sensor has demonstrated also high stability, outstanding sensitivity, and excellent analytical performance.In addition, the elaborated analytical tool has been successfully applied to the determination of various heavy metal ions in real samples, reflecting then its promising prospect in practical application.
对抗痕量金属污染并确保环境、生态系统、动物和人类安全的关键解决方案是更早且快速地检测痕量金属。基于所有这些原因，我们在这项工作中提出设计一种简单的电化学传感器，该传感器用绿色纳米颗粒功能化，用于电化学检测第四种最危险的重金属离子，即铜、锌、铅和汞。绿色纳米颗粒通过一步法制备，即由天然阿拉伯树胶聚合物还原铂纳米颗粒。为确保这些纳米颗粒设计的成功，已通过傅里叶变换红外光谱（FTIR）和热重分析（TGA）技术对纳米颗粒进行了表征。同时，对于电化学表征，我们采用循环伏安法（CV）和电化学阻抗谱（EIS）来控制表面改性的不同步骤，并监测差分脉冲阳极溶出伏安法（DPAS）以跟踪不同重金属的电化学检测。
已证实所制备的纳米颗粒具有良好的化学和物理性质。所开发的传感器分别对重金属离子表现出特定的电化学响应，检测下限（LOD）低于世界卫生组织推荐的值，顺序为：铜9.6 ppb、锌1.9 ppb、汞0.9 ppb、铅4.2 ppb。令人印象深刻的是，所制备的传感器还表现出高稳定性、出色的灵敏度和优异的分析性能。此外，所制备的分析工具已成功应用于实际样品中各种重金属离子的测定，这反映出其在实际应用中具有广阔前景。
