title: A water resistant solid-phase microextraction fiber with high selectivity prepared by a metal organic framework with perfluorinated pores.
abstract: A novel solid-phase microextraction (SPME) fiber was fabricated by the construction of fluorous metal organic frameworks (FMOF) and a polyimide (PI) composite strategy. As an auxiliary material, PI was expected to help FMOF particles form well-knit film on the surface of stainless steel wire and reinforce the coating, and FMOF was expected to afford a special structure to absorb, extract and enrich. Furthermore, it was explored for the headspace SPME (HS-SPME) of six volatile aromatic compounds (VACs) from water samples followed by gas chromatographic (GC) separation with flame ionization detection. Under the optimized conditions, the fiber afforded wide linear ranges (1-1000 μgL(-1)), low detection limits (0.15-0.9 μgL(-1)) and acceptable repeatability (<4.6%) and reproducibility (<7.3%). The FMOF@PI coated fiber not only offered large enhancement factors for benzene (1227) but also exhibited high extraction selectivity for benzene to other benzene homologues, hydrocarbons and phenols; for example, the extraction ratio of benzene to toluene, n-hexane and phenol could be as high as 10.2, 64.1 and 32.3, respectively. Moreover, the FMOF@PI-coated fiber afforded good thermal, water and organic solvent stabilities, and a long lifetime (over 200 times). The developed method was successfully applied to the determination of VACs in wastewater samples.
authors.affiliation: Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou, Henan 450001, China.
authors.forename: Jiajia
authors.initials: J
authors.lastname: Niu
authors.affiliation: Department of Physics-Chemistry, Henan Polytechnic University, Jiaozuo, Henan 454000, China. Electronic address: lizhongyue@hpu.edu.cn.
authors.forename: Zhongyue
authors.initials: Z
authors.lastname: Li
authors.affiliation: Department of Physics-Chemistry, Henan Polytechnic University, Jiaozuo, Henan 454000, China.
authors.forename: Huijuan
authors.initials: H
authors.lastname: Yang
authors.affiliation: Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou, Henan 450001, China.
authors.forename: Changwen
authors.initials: C
authors.lastname: Ye
authors.affiliation: Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou, Henan 450001, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.affiliation: Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou, Henan 450001, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Physics-Chemistry, Henan Polytechnic University, Jiaozuo, Henan 454000, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.affiliation: Zhengzhou Tobacco Research Institute of China National Tobacco Corporation, Zhengzhou, Henan 450001, China. Electronic address: fanl@ztri.com.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Fan
mesh_terms: D001554:Benzene / Q000302:isolation & purification; D005410:Flame Ionization; D006586:Hexanes / Q000302:isolation & purification; D057230:Limit of Detection; D009942:Organometallic Compounds / Q000737:chemistry*; D010636:Phenols / Q000302:isolation & purification; D015203:Reproducibility of Results; D012117:Resins, Synthetic / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000295:instrumentation / Q000379:methods; D013193:Stainless Steel; D014050:Toluene / Q000302:isolation & purification; D062065:Wastewater / Q000032:analysis; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D001554:Benzene; D006586:Hexanes; D009942:Organometallic Compounds; D010636:Phenols; D012117:Resins, Synthetic; D013193:Stainless Steel; D014050:Toluene; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; C026385:n-hexane; C029945:polyimide resin
keywords: Fluorine-lined; Hydrophobic; Metal organic framework; Selective extraction; Solid-phase microextraction