title: Three-dimensional ionic liquid functionalized magnetic graphene oxide nanocomposite for the magnetic dispersive solid phase extraction of 16 polycyclic aromatic hydrocarbons in vegetable oils.
abstract: In this paper, a novel three-dimensional ionic liquid functionalized magnetic graphene oxide nanocomposite (3D-IL@mGO) was prepared, and used as an effective adsorbent for the magnetic dispersive solid phase extraction (MSPE) of 16 polycyclic aromatic hydrocarbons (PAHs) in vegetable oil prior to gas chromatography-mass spectrometry (GC-MS). The properties of 3D-IL@mGO were characterized by scanning electron micrographs (SEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM). The 3D-IL@mGO, functionalized by ionic liquid, exhibited high adsorption toward PAHs. Compared to molecularly imprinted solid phase extraction (MISPE), the MSPE method based on 3D-IL@mGO had less solvent consumption and low cost, and was more efficent to light PAHs in quantitative analysis. Furthermore, the rapid and accurate GC-MS method coupled with 3D-IL@mGO MSPE procedure was successfully applied for the analysis of 16 PAHs in eleven vegetable oil samples from supermarket in Zhejiang Province. The results showed that the concentrations of BaP in 3 out of 11 samples were higher than the legal limit (2.0μg/kg, Commission Regulation 835/2011a), the sum of 8 heavy PAHs (BaA, CHR, BbF, BkF, BaP, IcP, DaA, BgP) in 11 samples was between 3.03μg/kg and 229.5μg/kg. Validation results on linearity, specificity, accuracy, precision and stability, as well as on application to the analysis of PAHs in oil samples demonstrated the applicability to food safety risk monitoring in China.
authors.affiliation: Quzhou Center for Disease Control and Prevention, Quzhou, Zhejiang, 324000, China.
authors.forename: Yun
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Quzhou Center for Disease Control and Prevention, Quzhou, Zhejiang, 324000, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Quzhou Center for Disease Control and Prevention, Quzhou, Zhejiang, 324000, China.
authors.forename: Zhe-Hua
authors.initials: ZH
authors.lastname: Zhang
authors.affiliation: Quzhou Center for Disease Control and Prevention, Quzhou, Zhejiang, 324000, China.
authors.forename: Xiang-Lun
authors.initials: XL
authors.lastname: Wu
authors.affiliation: Quzhou Center for Disease Control and Prevention, Quzhou, Zhejiang, 324000, China.
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Quzhou Center for Disease Control and Prevention, Quzhou, Zhejiang, 324000, China. Electronic address: 541190943@qq.com.
authors.forename: Chun-Fu
authors.initials: CF
authors.lastname: Fang
authors.affiliation: Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China; Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province, Ningbo Municipal Center for Disease Control and Prevention, Ningbo, Zhejiang, 315010, China. Electronic address: zhyg91213@163.com.
authors.forename: Yong-Gang
authors.initials: YG
authors.lastname: Zhao
mesh_terms: D000327:Adsorption; D002681:China; D008401:Gas Chromatography-Mass Spectrometry; D006108:Graphite / Q000737:chemistry; D052578:Ionic Liquids; D060328:Magnetic Phenomena; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000302:isolation & purification; D052616:Solid Phase Extraction / Q000379:methods*
chemical_list: D052578:Ionic Liquids; D010087:Oxides; D010938:Plant Oils; D011084:Polycyclic Aromatic Hydrocarbons; D006108:Graphite
keywords: Graphene oxide; Ionic liquid; Magnetic solid-phase extraction; Polycyclic aromatic hydrocarbons; Vegetable oil