College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China.
School of Ocean Information Engineering, Jimei University, Xiamen 361021, China.
Food Chem. 2025 Jan 15;463(Pt 3):141391. doi: 10.1016/j.foodchem.2024.141391. Epub 2024 Sep 21.
The overuse of pesticides results in excessive pesticide residues, posing a potential threat to human health. Herein, this work proposes a SERS substrate for the quantitative analysis of pesticide residues on food surfaces. Au cores are assembled on PS microspheres, followed by the modification of Raman internal standards (1,4-BDT) on the gold core surface and the growth of the Au shell. After incubating the analytes with PS@Au@1,4-BDT@Au particles, the mixture is dropped on the hydrophobic gold film for drying before detection. The SERS substrates exhibited high sensitivity and stability, with a detection limit of 10 M and an RSD of less than 7 %. Combined with a portable Raman spectrometer, the SERS detection of pesticide residues on three kinds of food surfaces is carried out, with a sensitivity of 10 M, meeting the US MRLs regulations. Therefore, this strategy may possess significant potential for future food safety.
过度使用农药会导致农药残留过多，对人类健康构成潜在威胁。在此，本工作提出了一种用于食品表面农药残留定量分析的 SERS 基底。Au 核组装在 PS 微球上，然后在金核表面修饰拉曼内标物（1,4-BDT）并生长 Au 壳。将分析物与 PS@Au@1,4-BDT@Au 颗粒孵育后，将混合物滴在疏水金膜上干燥，然后进行检测。SERS 基底表现出高灵敏度和稳定性，检测限为 10 M，RSD 小于 7%。结合便携式拉曼光谱仪，对三种食品表面的农药残留进行了 SERS 检测，灵敏度为 10 M，符合美国 MRLs 法规。因此，该策略在未来的食品安全中可能具有重要的应用潜力。
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