title: Fabrication of poly(3,4-ethylenedioxythiophene)-ionic liquid functionalized graphene nanosheets composite coating for headspace solid-phase microextraction of benzene derivatives.
abstract: A new poly(3,4-ethylenedioxythiophene)-ionic liquid (i.e. 1-hydroxyethyl-3-methyl imidazolium-bis[(trifluoromethyl)sulfonyl]imide) functionalized graphene nanosheets (PEDOT-IL/GNs) composite coating was electrodeposited on a stainless steel wire for headspace solid-phase microextraction. The coating showed porous folded and wrinkled structure and had large surface area due to the combined effect of PEDOT and IL/GNs. In addition, it displayed high thermal stability (up to 340 °C) and durable property (could be used for more than 200 times). The PEDOT-IL/GNs coating exhibited high affinity to benzene derivatives studied (i.e. toluene, 1,4-dimethylbenzene, 1,2-dimethylbenzene, 2-chlorotoluene, 1,3,5-trimethylbenzene and 1,4-dichlorobenzene) as they can interact through π-π and hydrophobic interactions. When they were extracted the enrichment factors ranged from 1901 (for 1,4-dichlorobenzene) to 3041 (for 1,4-dimethylbenzene). Coupled with gas chromatography-flame ionization detection, the benzene derivatives were extracted and determined. Wide linear ranges with 4 orders of magnitude (0.06-500 μg L(-1)) and low limits of detection (10.7-19.8 ng L(-1)) were achieved. The RSDs of chromatographic peak areas were <5.9% (n=5) and <7.5% (n=5) for single fiber and fiber-to-fiber, respectively. The method was applied to the determination of the benzene derivatives in real samples with acceptable recoveries from 82.3% to 108.3%.
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 Province, P. R. 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 Province, P. R. China.
authors.forename: Liying
authors.initials: L
authors.lastname: Wang
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 Province, P. R. China.
authors.forename: Baizhao
authors.initials: B
authors.lastname: Zeng
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 Province, P. R. China. Electronic address: fqzhao@whu.edu.cn.
authors.forename: Faqiong
authors.initials: F
authors.lastname: Zhao
mesh_terms: D001555:Benzene Derivatives / Q000302:isolation & purification*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D005410:Flame Ionization; D006108:Graphite / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000295:instrumentation*; D013193:Stainless Steel
chemical_list: D001555:Benzene Derivatives; D019086:Bridged Bicyclo Compounds, Heterocyclic; D052578:Ionic Liquids; D011108:Polymers; C121383:poly(3,4-ethylene dioxythiophene); D013193:Stainless Steel; D006108:Graphite
keywords: Benzene derivatives; Gas chromatography; Ionic liquid functionalized graphene nanosheets; Poly(3,4-ethylenedioxythiophene); Solid-phase microextraction