Huang Yutong, Luo Yan, Zhang Xiaoqing, Li Shanglin, Liu Mei
College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710119, China.
Key Laboratory of Applied Surface and Colloid Chemistry of Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
Food Chem. 2025 Apr 30;472:142919. doi: 10.1016/j.foodchem.2025.142919. Epub 2025 Jan 15.
The accurate detection of carbamate pesticides popularly employed in agricultural products is critical for reducing the threat of resultant residues to human health. In this work, a regenerable nanofilm used for SERS substrate was constructed by interfacially confined self-assembly incorporating CdS nanowires (CdSNWs) and Ag nanoparticles (AgNPs). The constructed AgNPs-CdSNWs/Nanofilm could significantly enhance the Raman signals of three carbamate pesticides (metolcarb, carbaryl and aldicarb-sulfone). A broad detection linear ranged 0.001-100 mg/L was achieved. The detection limits (LOD) of metolcarb, carbaryl and aldicarb-sulfone reached 0.00081 mg/L, 0.00081 mg/L and 0.00072 mg/L with coefficients of determination of (R) of 0.992, 0.991 and 0.992, percent recovery ranged 86.5-104.9 %，88.2-105.1 % and 87.0-104.5 %, respectively, and relative standard deviation (RSD) values were all less than 4.0 %. Results showed that the user-friendly reproducible nanofilm could be employed as simple-to-establish SERS platform for rapid detection of carbamate pesticides in food.
准确检测农产品中广泛使用的氨基甲酸酯类农药对于降低其残留对人类健康的威胁至关重要。在这项工作中，通过界面受限自组装将硫化镉纳米线（CdSNWs）和银纳米颗粒（AgNPs）结合，构建了一种用于表面增强拉曼光谱（SERS）基底的可再生纳米薄膜。构建的AgNPs-CdSNWs/纳米薄膜能够显著增强三种氨基甲酸酯类农药（速灭威、西维因和涕灭威砜）的拉曼信号。实现了0.001-100 mg/L的宽检测线性范围。速灭威、西维因和涕灭威砜的检测限（LOD）分别达到0.00081 mg/L、0.00081 mg/L和0.00072 mg/L，测定系数（R）分别为0.992、0.991和0.992，回收率范围分别为86.5-104.9%、88.2-105.1%和87.0-104.5%，相对标准偏差（RSD）值均小于4.0%。结果表明，这种用户友好的可重现纳米薄膜可作为一种易于建立的SERS平台，用于快速检测食品中的氨基甲酸酯类农药。
