Tan Chong, Liu Xueyan, Yang Kaijie, Li Junsheng, Yin Yuhong, Zuo Jinlong
School of Food Engineering, Harbin University of Commerce, Harbin, 150028, PR China.
Mikrochim Acta. 2025 Jun 23;192(7):444. doi: 10.1007/s00604-025-07280-0.
A novel electrochemical sensor (NiO/MoS₂/rGO/GCE) designed for the sensitive detection of methyl parathion (MP) pesticide residues has been developed. The NiO/MoS₂/rGO composite was synthesized via hydrothermal and solvothermal methods, with successful formation and optimized microstructural characteristics validated through scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Empirical results demonstrated that the incorporation of NiO markedly augmented both the electrochemically active sites and electron-transfer efficiency, thereby enabling the sensor to achieve an excellent linear detection range of 0.01-10 μg/mL for MP, accompanied by a notably low detection limit of 1.1 ng/mL (S/N = 3). Furthermore, the sensor exhibited superior anti-interference performance, achieving recovery percentages ranging from 97.7 to 108.8% in practical sample analyses (apple juice), with relative standard deviations (RSD) between 2.7 and 5.2%. Overall, this research offers a promising and cost-effective approach for highly sensitive pesticide residue detection, underscoring its substantial potential for broad practical applications.
一种用于灵敏检测甲基对硫磷（MP）农药残留的新型电化学传感器（NiO/MoS₂/rGO/GCE）已被研制出来。通过水热法和溶剂热法合成了NiO/MoS₂/rGO复合材料，并通过扫描电子显微镜、X射线衍射和X射线光电子能谱验证了其成功形成及优化的微观结构特征。实验结果表明，NiO的加入显著增加了电化学活性位点和电子转移效率，从而使该传感器对MP实现了0.01 - 10 μg/mL的优异线性检测范围，同时检测限低至1.1 ng/mL（S/N = 3）。此外，该传感器表现出卓越的抗干扰性能，在实际样品（苹果汁）分析中的回收率为97.7%至108.8%，相对标准偏差（RSD）在2.7%至5.2%之间。总体而言，本研究为高灵敏农药残留检测提供了一种有前景且经济高效的方法，突显了其在广泛实际应用中的巨大潜力。
