基于 SERS 的双金属核壳纳米粒子（Au@AgNPs）用于快速检测液态奶中的福美双和双氰胺污染物。
Bimetallic core shelled nanoparticles (Au@AgNPs) for rapid detection of thiram and dicyandiamide contaminants in liquid milk using SERS.
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, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, 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, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, 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
Food Chem. 2020 Jul 1;317:126429. doi: 10.1016/j.foodchem.2020.126429. Epub 2020 Feb 19.
Existing methods for contaminants detection in liquid milk are complex, requires chemicals and time-consuming experimental procedure. In this study, SERS based on bimetallic core shelled nanoparticles was employed for simultaneous and fast detection of thiram and dicyandiamide (DCD) in the milk. Spectra ranging from 400 to 1700 cm were selected to examine thiram (0.5, 1, 2, 5 and 10 ppm) and DCD (20, 40, 80,160 and 320 ppm), by employing 28 nm gold cores and silver-shell thickness of 8 nm. A strong peak at 1379 cm was ascribed to thiram with LOD of 0.21 ppm and R of 0.9896, whereas a band at 929 cm was associated with DCD, delivering LOD of 14.88 ppm and R of 0.9956. The proposed method could achieve results within 34 min and this ecofriendly method can be further employed for simultaneous and rapid screening of other accidental contaminants in milk.
现有的液态奶中污染物检测方法复杂，需要使用化学物质且实验过程耗时。在这项研究中，基于双金属核壳纳米粒子的 SERS 被用于同时快速检测牛奶中的福美双和双氰胺（DCD）。选择了 400 到 1700 cm 的光谱范围，采用 28nm 金核和 8nm 银壳厚度来检测福美双（0.5、1、2、5 和 10 ppm）和 DCD（20、40、80、160 和 320 ppm）。在 1379 cm 处出现了一个强峰，归因于福美双，其 LOD 为 0.21 ppm，R 为 0.9896，而在 929 cm 处出现的带与 DCD 有关，LOD 为 14.88 ppm，R 为 0.9956。该方法可在 34 分钟内得出结果，这种环保方法可进一步用于同时快速筛选牛奶中的其他意外污染物。
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