title: A novel poly(3,4-ethylenedioxythiophene)-ionic liquid composite coating for the headspace solid-phase microextraction and gas chromatography determination of several alcohols in soft drinks.
abstract: A novel poly(3,4-ethylenedioxythiophene)-ionic liquid (i.e., 1-hydroxyethyl-3-methyl imidazolium-bis[(trifluoromethyl)sulfonyl]imide) composite film was electrodeposited on a Pt wire for headspace solid-phase microextraction. The film showed nodular structure and had large specific surface. In addition, it displayed high thermal stability (up to 300°C) and durable property (could be used for more than 200 times). Coupled with gas chromatography-flame ionization detection, the resulting fiber was applied to the headspace solid-phase microextraction and determination of several alcohols (i.e., linalool, nonanol, terpineol, geraniol, decanol and dodecanol). It presented higher extraction capability in comparison with the poly(3,4-ethylenedioxythiophene) and commercial polydimethylsiloxane/divinylbenzene fiber. Under the optimized conditions, the linear ranges exceeded three magnitudes with correlation coefficients above 0.9952 and the low limits of detection were 34.2-81.3ng L(-1). For different alcohols the repeatabilities (defined as RSD) were <5.8% and <7.8% for single fiber (n=5) and fiber-to-fiber (n=4), respectively. The proposed method was applied to the determination of these alcohols in real samples with acceptable recoveries from 81.1% to 106.6%.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, PR 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, Hubei 430072, PR China.
authors.forename: Haibo
authors.initials: H
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, PR China.
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, Hubei 430072, PR China. Electronic address: bzzeng@whu.edu.cn.
authors.forename: Baizhao
authors.initials: B
authors.lastname: Zeng
mesh_terms: D000438:Alcohols / Q000032:analysis / Q000302:isolation & purification*; D019086:Bridged Bicyclo Compounds, Heterocyclic / Q000737:chemistry*; D002253:Carbonated Beverages / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods; D005410:Flame Ionization / Q000379:methods; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D011108:Polymers / Q000737:chemistry*; D052617:Solid Phase Microextraction / Q000379:methods
chemical_list: D000438:Alcohols; D019086:Bridged Bicyclo Compounds, Heterocyclic; D052578:Ionic Liquids; D011108:Polymers; C121383:poly(3,4-ethylene dioxythiophene)
keywords: Alcohols; Gas chromatography; Ionic liquids; Poly(3,4-ethylenedioxythiophene); Solid-phase microextraction