title: Facile synthesis of polyaniline-coated SiO₂ nanofiber and its application in enrichment of fluoroquinolones from honey samples.
abstract: In this study, polyaniline coated SiO2 nanofibers (PANI/SiO2) was prepared by combining electrospinning technique with in-situ polymerization. The proposed strategy for the preparation of PANI/SiO2 can eliminate the aggregation of PANI and the yield of PANI/SiO2 was high. Scanning electron microscopy (SEM) images showed that PANI nanoparticles were uniformly coated on the surface of SiO2 nanofibers. The as-prepared PANI/SiO2 nanofibers were then applied as the sorbent for in-syringe dispersive solid-phase extraction (dSPE) for the extraction of fluoroquinolones (FQs) from honey samples. The influence of SiO2 amount on the formation of PANI/SiO2 and several parameters that affect the extraction efficiency were investigated. Under optimized conditions, a rapid, simple and effective method for the determination of FQs in honey sample was developed by coupling with liquid chromatography-fluorescence detector (LC-FLD) analysis. Due to the fast extraction equilibrium, the whole sample pretreatment process could be accomplished within 4 min. The limits of detection (LODs) for the target FQs were found to be 0.1-1.3 ng/g. The recoveries in honey sample were in the range of 81.4-118.1% with the RSDs of 0.8-14.4% (intra-day) and 1.4-14.9% (inter-day). This study offers a new strategy for the preparation of functional SiO2 nanofibers using post-electrospinning modification by in-situ polymerization, which could be generally applied in the preparation of various separation materials with electrospun nanofibers.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
authors.forename: Xiao-Mei
authors.initials: XM
authors.lastname: He
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
authors.forename: Gang-Tian
authors.initials: GT
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
authors.forename: Hao-Bo
authors.initials: HB
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
authors.forename: Sheng-Nan
authors.initials: SN
authors.lastname: Xu
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China.
authors.forename: Bi-Feng
authors.initials: BF
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department of Chemistry, Wuhan University, Wuhan 430072, PR China. Electronic address: yqfeng@whu.edu.cn.
authors.forename: Yu-Qi
authors.initials: YQ
authors.lastname: Feng
mesh_terms: D000814:Aniline Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004867:Equipment Design; D024841:Fluoroquinolones / Q000302:isolation & purification*; D006722:Honey / Q000032:analysis*; D057230:Limit of Detection; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D058105:Polymerization; D012822:Silicon Dioxide / Q000138:chemical synthesis / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation / Q000379:methods*
chemical_list: D000814:Aniline Compounds; D024841:Fluoroquinolones; C416807:polyaniline; D012822:Silicon Dioxide
keywords: Electrospinning; Fluoroquinolones; In-situ polymerization; In-syringe dispersive solid phase extraction; Polyaniline