Record number :
1978478
Title of article :
Vortex-assisted magnetic dispersive solid-phase microextraction for rapid screening and recognition of dicofol residues in tea products
Author/Authors :
Cheng، نويسنده , , Xiaoling and Yan، نويسنده , , Hongyuan and Wang، نويسنده , , Xiaoling and Sun، نويسنده , , Ning and Qiao، نويسنده , , Xiaoqiang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
6
From page :
104
To page :
109
Abstract :
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.
Keywords :
Dummy molecularly imprinted microspheres , Column liquid chromatography , Dicofol , Tea products , Magnetic dispersive solid-phase microextraction
Journal title :
Food Chemistry
Journal title :
Food Chemistry
Serial Year :
2014
Link To Document :
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