期刊
FOOD CHEMISTRY
卷 139, 期 1-4, 页码 24-30出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.01.109
关键词
Ractopamine; Dummy-template; Molecularly imprinting polymers; In situ polymerisation; Solid phase extraction; Liquid chromatography- mass spectrometry
资金
- National Natural Science Foundations of China [30873193, 81173024]
Molecularly imprinted polymers (MIPs) for selective adsorption of ractopamine hydrochloride (RAC) were synthesised by an in situ method, in which salbutamol (SAL) was used as the dummy-template to avoid the template leakage. Scanning electron microscopy (SEM), mercury porosimerty and Fourier transform infrared spectroscopy (FTIR) were used to investigate the physical and morphological characteristics of the dummy-template MIPs. The test of adsorption selectivity indicated that the dummy-template MIPs exhibited high selectivity to RAC. The saturated adsorption capacity for RAC on dummy-template MIPs was 90.9 mu g g(-1). Based on the dummy-template polymers, a liquid chromatography-mass spectrometry (LC-MS) method was developed for the selective analysis of RAC in real pork samples. The averages of intra- and inter-day accuracy ranged from 78.9% to 92.2% and from 90.7% to 93.1%, respectively. The RSD% of repeatability ranged from 1.9% to 6.3%, and the RSD% of intermediate precision ranged from 3.5% to 9.2%, while the limit of detection (LOD) was 0.02 mu g kg(-1). Crown Copyright (c) 2013 Published by Elsevier Ltd. All rights reserved.
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