文献类型：期刊文献

英文题名：Fast enrichment and ultrasensitive in-situ detection of pesticide residues on oranges with surface-enhanced Raman spectroscopy based on Au nanoparticles decorated glycidyl methacrylate-ethylene dimethacrylate material

作者：Wang, Xuan;Du, Yiping[1];Zhang, Han;Xu, Ying;Pan, Yingcheng;Wu, Ting;Hu, Huilian

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Res Ctr Anal & Test, Shanghai 200237, Peoples R China

年份：2014

卷号：46

起止页码：108

外文期刊名：FOOD CONTROL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000340300300017)】；

基金：This work was supported by General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China (2011IK226).

语种：英文

外文关键词：Pesticide residues; Surface-enhanced Raman spectroscopy (SERS); Au nanoparticles (AuNPs) decorated glycidyl; methacrylate-ethylene dimethacrylate; (GMA-EDMA) powder material; Oranges

摘要：In this study, a fast and ultrasensitive method is proposed for the detection of pesticide residues on oranges. Au nanopartides (AuNPs) decorated glycidyl methacrylate ethylene dimethacrylate (GMA -EDMA) powder material served as the solid-phase extraction (SPE) sorbent is synthesized and developed for preconcentration of pesticide residues on oranges and in-situ surface-enhanced Raman spectroscopy (SERS) detection. Here the material is served as not only an enrichment medium but also an enhancement substrate base of the SERS detection. Sample solution is flowed through the material under a vacuum for an enrichment of the analytes and then the concentrated analytes on the material are detected with the Raman spectroscopy. With this method, SERS spectra of phosmet and disulfoton could be identified at concentrations of 5 mu g/L and 1 mu g/L, respectively. The quantitative curves show linear relationship between Raman intensities and the concentrations of analytes. Furthermore, in real samples detection, phosmet at 8.25 mu g/kg and disulfoton at 39.7 mu g/kg spiked on oranges can be detected by SERS. Based on the synthesized material and its application in SPE-SERS operation, the method represents ultrasensitive SERS performance in real samples detection with a simple and rapid pre-treatment, which indicates that it could be served as a useful means in monitoring pesticide residues. (C) 2014 Elsevier Ltd. All rights reserved.