Arul C, Vealan S B Mayil, Archana P, Sekar C
Department of Bioelectronics and Biosensors, Alagappa University, Karaikudi, Tamil Nadu, 630003, India.
Mikrochim Acta. 2025 Jul 2;192(8):468. doi: 10.1007/s00604-025-07317-4.
Monitoring and detection of organophosphate pesticides in fresh vegetables and fruits are essential due to their increased usage and harmful effects on the environment and human health. This study presents the development and evaluation of a straightforward non-enzymatic electrochemical sensor for detecting paraoxon ethyl (PoE), one of the most widely used pesticides to protect crops from pests. We have synthesized nanostructured Co-Benzene Tricarboxylic acid (BTC) metal organic framework (MOF) by a mechanochemical method at room temperature and used it directly as an electrode material to modify a glassy carbon electrode (GCE). The electrochemical detection of PoE has been carried out using a Co-BTC/GCE in a phosphate-buffered saline at pH 7.0. The modified electrode displayed a remarkable electrocatalytic response towards the reduction of PoE through the appearance of a sharp peak at - 0.68 V with high selectivity over a wide concentration range of 1-1770 µM and a low detection limit of 0.13 µM. Also, the sensor exhibited high stability and reproducibility, making it a promising tool for PoE detection in farm-fresh brinjal, grape, and strawberry. Thus, the developed sensor provides an affordable, sensitive, and dependable platform for pesticide detection and supporting environmental conservation initiatives.
由于有机磷农药在新鲜蔬菜和水果中的使用量增加及其对环境和人类健康的有害影响，对其进行监测和检测至关重要。本研究介绍了一种用于检测对氧磷乙酯（PoE）的简单非酶电化学传感器的开发和评估，PoE是用于保护作物免受虫害的最广泛使用的农药之一。我们在室温下通过机械化学方法合成了纳米结构的钴-苯三甲酸（BTC）金属有机框架（MOF），并将其直接用作电极材料来修饰玻碳电极（GCE）。在pH 7.0的磷酸盐缓冲盐水中使用Co-BTC/GCE对PoE进行了电化学检测。修饰电极通过在-0.68 V处出现一个尖锐峰，对PoE的还原表现出显著的电催化响应，在1-1770 µM的宽浓度范围内具有高选择性，检测限低至0.13 µM。此外，该传感器具有高稳定性和重现性，使其成为检测新鲜茄子、葡萄和草莓中PoE的有前途的工具。因此，所开发的传感器为农药检测提供了一个经济实惠、灵敏且可靠的平台，并支持环境保护倡议。
