In recent years, there has been growing concern among consumers about pesticide contamination in fruits. Therefore, rapid, reliable, and consistent detection methods for OPPs, especially dimethoate, are crucially needed. The existing quantitative methods for detecting dimethoate are not suitable for rapid measuring system such as the dimethoate samples from two channels. Hence this paper examines the utilization of a dual-channel system for utilize the absorption variations of the Localized Surface Plasmon Resonance (LSPR) bands of gold nanoparticles (AuNPs) were investigate for detection of dimethoate. Under optimized conditions, the relationship between concentrations of dimethoate and absorbance ratios (A(520)/A(640)) was linearly found in the concentration range of 10–100 nM. Result from the experiment shows that both channels exhibit a linear correlation coefficient as high as 0.97 and a limit of detection (LOD) as low as 5.5 nM. This LSPR detection system was characterized by testing the dimethoate in apple samples and the recovery rates were found to be in the range of 85.90% to 107.37%. The proposed dual-channel LSPR system for detecting dimethoate creating a new approach for detecting organophosphate insecticide in agricultural fields. It could lay the foundation for designing a high-throughput analysis of the insecticides using a wavelength division multiplexing switch (WDMS).

近年来，消费者对水果中的农药污染越来越关注。因此，迫切需要快速，可靠和一致的OPPs检测方法，尤其是乐果。现有的检测乐果的定量方法不适用于快速测量系统，例如来自两个通道的乐果样品。因此，本文研究了利用双通道系统来利用金纳米颗粒（AuNPs）的局部表面等离子体共振（LSPR）谱带的吸收变化来研究乐果的检测方法。在最佳条件下，乐果浓度与吸光度比（A（520）/ A（640））之间的关系在10–100 nM的浓度范围内呈线性关系。实验结果表明，两个通道的线性相关系数均高达0.97，检测限（LOD）则低至5.5 nM。该LSPR检测系统的特点是测试了苹果样品中的乐果，回收率在85.90％至107.37％之间。拟议中的用于检测乐果的双通道LSPR系统为检测农田中的有机磷杀虫剂开辟了一种新方法。它可以为使用波分复用开关（WDMS）设计杀虫剂的高通量分析奠定基础。90％至107.37％。拟议中的用于检测乐果的双通道LSPR系统为检测农田中的有机磷杀虫剂开辟了一种新方法。它可以为使用波分复用开关（WDMS）设计杀虫剂的高通量分析奠定基础。90％至107.37％。拟议中的用于检测乐果的双通道LSPR系统为检测农田中的有机磷杀虫剂开辟了一种新方法。它可以为使用波分复用开关（WDMS）设计杀虫剂的高通量分析奠定基础。