金纳米棒的制备及其用于苹果中噻菌灵的 SERS 检测
Fabrication of gold nanorods for SERS detection of thiabendazole in apple.
机构信息
School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, Guangzhou Higher Education Mega Center, Guangzhou 510006, China.
School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, Guangzhou Higher Education Mega Center, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland.
出版信息
Talanta. 2019 Apr 1;195:841-849. doi: 10.1016/j.talanta.2018.11.114. Epub 2018 Dec 2.
Thiabendazole (TBZ) is a kind of pesticide that is widely used in agriculture, and its residue may pose a threat to human health. In order to measure TBZ residues in food samples, a surface-enhanced Raman spectroscopy (SERS) method combined with a homogeneous and reusable gold nanorods (GNR) array substrate was proposed. GNR with a high uniformity was synthesized and then applied to the self-assembly of a GNR vertically aligned array. The relative standard deviation (RSD) of the array for SERS could reach 15.4%, and the array could be reused for more than seven times through the treatment of plasma etching. A logarithmic correlation between TBZ concentration and Raman intensity was obtained, with the best determination coefficient (R) and the corresponding limit of detection (LOD) of 0.991 and 0.037 mg/L in methanol solution, and 0.980 and 0.06 ppm in apple samples, respectively. The recoveries of TBZ in apple samples ranged from 76% to 107%. This study provided a rapid and sensitive approach for detecting TBZ in apples based on SERS coupled with GNR array substrate, showing great potential for analyzing other trace contaminants in food matrices.
噻苯达唑（TBZ）是一种广泛应用于农业的农药，其残留可能对人类健康构成威胁。为了测量食品样品中的 TBZ 残留量，提出了一种表面增强拉曼光谱（SERS）方法，该方法结合了均匀且可重复使用的金纳米棒（GNR）阵列衬底。合成了具有高均匀性的 GNR，然后将其应用于 GNR 垂直排列阵列的自组装。该阵列的 SERS 相对标准偏差（RSD）可达到 15.4%，并且通过等离子体蚀刻处理，该阵列可重复使用超过七次。在甲醇溶液中，TBZ 浓度与拉曼强度之间存在对数相关性，最佳决定系数（R）和相应的检测限（LOD）分别为 0.991 和 0.037mg/L，在苹果样品中分别为 0.980 和 0.06ppm。TBZ 在苹果样品中的回收率在 76%到 107%之间。本研究为基于 SERS 结合 GNR 阵列衬底检测苹果中的 TBZ 提供了一种快速灵敏的方法，显示了在分析食品基质中其他痕量污染物方面的巨大潜力。
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