The growing population and global food demands have encouraged the use of pesticides to increase agricultural yields; however, the irrational use of pesticides threatens human health and the environment. Carbaryl (CRBL) is the most widespread insecticide and severely affects soil, water systems, and human health. Thus, it is crucial to monitor CRBL residues in the environment and vegetable samples. This study reports the rapid and sensitive electrochemical detection of CRBL based on a pyrochlore-type lanthanum tin oxide (LSO) nanoparticles (NPs)-modified screen-printed carbon electrode (SPCE). A low-temperature hydrothermal method was employed to prepare the LSO NPs. The structural properties of the LSO NPs were characterized by X-ray diffraction, Raman, and X-ray photoelectron spectroscopy analyses. The LSO NPs/SPCE demonstrated good electroanalytical performance for CRBL detection, with a low detection limit of 0.4 nM (0.08 µg/L) and a sensitivity of 1.05 µA/(µM cm²). Furthermore, the LSO NPs/SPCE exhibited high selectivity among highly interfering carbamate and organophosphorus pesticides, which share similar mechanisms of action. Additionally, the LSO NPs/SPCE sensor achieved > 90% recovery for the detection of CRBL in soil, water, and vegetable samples, thus verifying its suitability for the rapid detection of CRBL.

不断增长的人口和全球粮食需求鼓励使用杀虫剂来增加农业产量；然而，农药的不合理使用威胁着人类健康和环境。卡巴利 (CRBL) 是最广泛使用的杀虫剂，严重影响土壤、水系统和人类健康。因此，监测环境和蔬菜样品中的 CRBL 残留至关重要。本研究报告了基于烧绿石型氧化镧锡 (LSO) 纳米粒子 (NPs) 修饰的丝网印刷碳电极 (SPCE) 对 CRBL 进行快速灵敏的电化学检测。采用低温水热法制备 LSO NPs。LSO NPs 的结构特性通过 X 射线衍射、拉曼和 X 射线光电子能谱分析来表征。² )。此外，LSO NPs/SPCE 在具有相似作用机制的高干扰氨基甲酸酯和有机磷农药中表现出高选择性。此外，LSO NPs/SPCE 传感器在检测土壤、水和蔬菜样品中的 CRBL 时实现了 > 90% 的回收率，从而验证了其对 CRBL 快速检测的适用性。