title: Facile fabrication of ionic liquid doped polycarbazole coating for the headspace solid-phase microextraction of some environmental pollutants.
abstract: A novel polycarbazole (PCz)-ionic liquid (IL, i.e. 1-hydroxyethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide, [HOEMIm][NTf2]) composite coating (PCz-IL) was fabricated by electrodeposition. The IL could facilitate the electrodeposition of poor-conductive PCz and a more porous coating was obtained. The composite coating exhibited enhanced extraction capacity for some environmental pollutants (i.e. o-chlorotoluene, p-bromotoluene, o-nitrotoluene, m-nitrotoluene, p-nitrotoluene), as they could interact through π-π and hydrophobic interactions. Compared with [HOEMIm][NTf2] coated fiber, some other PCz-IL fibers (here IL=1-hydroxyethyl-3-methylimidazolium hexafluorophosphate and 1-methyl-3-octylimidazolium hexafluorophosphate) and commercial fibers (i.e. polydimethylsiloxane and polyacrylate), the PCz-IL fiber showed better performance. It was used for the determination of the environmental pollutants by coupling with gas chromatography, the limits of detection were 47.8-65.9 ng L(-1) under the optimized conditions and the linear ranges were 0.1-500 μg L(-1) with correlation coefficients above 0.9947 for different compounds. The relative standard deviations (RSDs) were 3.4-4.6% for five successive extractions with single fiber, and the RSDs for inter-fiber were 6.5-10.4% (n=5). The fiber was successfully applied to the detection of real samples and the recoveries for standards added were 88.6-108.8% with RSDs below 9.7%.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Feng
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China.
authors.forename: Mian
authors.initials: M
authors.lastname: Wu
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China. Electronic address: fqzhao@whu.edu.cn.
authors.forename: Faqiong
authors.initials: F
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China.
authors.forename: Baizhao
authors.initials: B
authors.lastname: Zeng
mesh_terms: D002227:Carbazoles / Q000138:chemical synthesis*; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis*; D004595:Electroplating / Q000379:methods*; D004785:Environmental Pollutants / Q000032:analysis*; D052578:Ionic Liquids / Q000138:chemical synthesis*; D052617:Solid Phase Microextraction / Q000379:methods*
chemical_list: D002227:Carbazoles; D020099:Coated Materials, Biocompatible; D004785:Environmental Pollutants; D052578:Ionic Liquids
keywords: Electropolymerization; Ionic liquid; Nitrobenzenes; Polycarbazole; Solid-phase microextraction