Journal
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume 66, Issue 7, Pages 748-755Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.201800377
Keywords
ionic liquids; magnetic solid-phase extraction; polycyclic aromatic hydrocarbons; smoked meat; thiol-ene click chemistry; water samples
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Funding
- higher-level talents scientific research projects funded start-up funds of Hechi University [XJ2018GKQ012]
- Natural Science Foundation of Guangxi Province [2014GXNSFBA118045, 2015GXNSF AA139030, 2017GXNSFAA198118, 2018 GXNSFAA138140]
- project of undergraduate teaching reform of higher education in Guangxi [2018JGA254]
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In the present study, ionic liquid (IL)-modified Fe3O4 magnetic nanoparticles (Fe3O4) were synthesized by the thiol-ene click reaction for magnetic solid-phase extraction (MSPE) of polycyclic aromatic hydrocarbons (PAHs) in water and smoked meat samples. An IL 1-vinyl-3-butylimidazolium bromide was firstly synthesized, and then immobilized on the surface of thiol group-functionalized Fe3O4 via a thiol-ene click reaction. The as-synthesized Fe3O4@ILs were characterized using Fourier transform infrared spectroscopy, X-ray diffraction, and transmission electron microscopy. Various parameters (including the amount of adsorbent, extraction time, sample volume, and desorption conditions) affecting MSPE were optimized. Under the optimum conditions, the limits of detection of four PAHs in the range of 0.6-7.2 ng/L were obtained using high-performance liquid chromatography-ultraviolet detection. The accuracy of the method was assessed by recovery measurements on spiked real samples and good recovery of 80-108% with relative standard deviations lower than 8.16% was achieved. The enrichment factors ranging from 699 to 858 were obtained for the analytes. This result indicated that the proposed method had great potential for sample preparation.
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