A simple and rapid vortex-assisted magnetic dispersive solid-phase microextraction (VAMDSME) method coupled with gas chromatography-electronic capture detection was developed for rapid screening and selective recognition of dicofol in tea products. The magnetic molecularly imprinted microspheres (mag-MIMs) synthesised by aqueous suspension polymerisation using dichlorodiphenyltrichloroethane (DDT) as a dummy template showed high selectivity and affinity to dicofol in aqueous solution and were successfully applied as special adsorbents of VAMDSME for rapid isolation of dicofol from complex tea matrix. Good linearity was obtained in a range of 0.2-160 ng g(-1) and the limit of detection based on a signal to noise ratio of 3 was 0.05 ng g(-1). The recoveries at three spiked levels ranged from 83.6% to 94.5% with the related standard deviations (RSD) <= 5.0%. The VAMDSME-GC protocol, which took advantages of the selective adsorption of molecularly imprinted microspheres and rapid magnetic phase separation, as well as the short equilibrium time by vortex-assisted, could avoid the time-consuming procedures related to other traditional extraction methods. (C) 2014 Elsevier Ltd. All rights reserved.
基金:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China [31301464, 21205027]; National Science and Technology Major Projects for "Major New Drugs Innovation and Development" [2011ZX09302-007-01]; Natural Science Foundation of Hebei ProvinceNatural Science Foundation of Hebei Province [B2012201052]
第一作者机构:[1]Hebei Univ, Minist Educ, Key Lab Med Chem & Mol Diag, Baoding 071002, Peoples R China;[2]Hebei Univ, Coll Pharmaceut Sci, Baoding 071002, Peoples R China;[3]Capital Univ Med Sci, Beijing Childrens Hosp, Beijing 100045, Peoples R China
通讯作者:
通讯机构:[1]Hebei Univ, Minist Educ, Key Lab Med Chem & Mol Diag, Baoding 071002, Peoples R China;[2]Hebei Univ, Coll Pharmaceut Sci, Baoding 071002, Peoples R China;
推荐引用方式(GB/T 7714):
Cheng Xiaoling,Yan Hongyuan,Wang Xiaoling,et al.Vortex-assisted magnetic dispersive solid-phase microextraction for rapid screening and recognition of dicofol residues in tea products[J].FOOD CHEMISTRY.2014,162:104-109.doi:10.1016/j.foodchem.2014.04.023.
APA:
Cheng, Xiaoling,Yan, Hongyuan,Wang, Xiaoling,Sun, Ning&Qiao, Xiaoqiang.(2014).Vortex-assisted magnetic dispersive solid-phase microextraction for rapid screening and recognition of dicofol residues in tea products.FOOD CHEMISTRY,162,
MLA:
Cheng, Xiaoling,et al."Vortex-assisted magnetic dispersive solid-phase microextraction for rapid screening and recognition of dicofol residues in tea products".FOOD CHEMISTRY 162.(2014):104-109