期刊
FOOD CHEMISTRY
卷 164, 期 -, 页码 527-535出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.05.071
关键词
Molecularly imprinted polymers; Electrospun nanofibrous membrane; Bisphenol A; Tebuconazole; Membrane-based molecularly imprinted solid-phase extraction; Vegetable and juice samples
资金
- National Natural Science Foundation of China [21277054]
- National High Technology Research and Development Program of China [2012AA06A304]
- Doctoral Fund of Ministry of Education of China [20110142110021]
Nanofibrous molecularly imprinted membranes (nano-MIMs) with multi-analyte selectivity were prepared by encapsulating two types of molecularly imprinted polymer nanoparticles (MIP-NPs) into electrospun polyvinyl alcohol nanofibers. The obtained nano-MIMs maintained high molecular selectivity offered by each of the MIP-NPs. Nano-MIM embedding BPA-imprinted nanoparticles and TBZ-imprinted nanoparticles together showed the highest binding selectivity for acid bisphenol A (BPA) and basic tebuconazole (TBZ). This nano-MIM was used as affinity material of membrane-based molecularly imprinted solid-phase extraction (m-MISPE) to extract trace BPA and TBZ in vegetables and juices simultaneously. The recoveries of BPA and TBZ from different samples were higher than 70.33% with RSDs lower than 9.57%. m-MISPE gave better HPLC separation efficiencies and higher recoveries than conventional SPE based on C18/SCX. Multi-analyte selective m-MISPE combined with HPLC realized selective and simultaneous determination of several trace analytes with opposite charges/polarities in different food samples. (C) 2014 Elsevier Ltd. All rights reserved.
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