title: Ionic liquid supported on an electrodeposited polycarbazole film for the headspace solid-phase microextraction and gas chromatography determination of aromatic esters.
abstract: A polycarbazole film was electrodeposited on a stainless-steel wire from a solution of N,N-dimethylformamide/propylene carbonate (1:9 v/v) containing 0.10 M carbazole and 0.10 M tetrabutylammonium perchlorate. The obtained polycarbazole fiber was immersed into an ionic liquid (1-hydroxyethyl-3-methyl imidazolium bis[(trifluoromethyl)sulfonyl]imide) solution (in dimethylsulfoxide) for 30 min, followed by drying under an infrared lamp. The resulting polycarbazole/ionic liquid fiber was applied to the headspace solid-phase microextraction and determination of aromatic esters by coupling with gas chromatography and flame ionization detection. Under the optimized conditions, the limits of detection were below 61 ng/L (S/N = 3) and the linear ranges were 0.061-500 μg/L with correlation coefficients above 0.9876. The relative standard deviations were below 4.8% (n = 5) for a single fiber, and below 9.9% for multi-fiber (n = 4). This fiber also exhibited good stability. It could be used for more than 160 times of headspace solid-phase microextraction and could withstand a high temperature up to 350°C.
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China.
authors: Yuanyuan
authors: Y
authors: Feng
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China.
authors: Faqiong
authors: F
authors: Zhao
authors: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei, China.
authors: Baizhao
authors: B
authors: Zeng
mesh_terms: D002227:Carbazoles / Q000737:chemistry*; D002849:Chromatography, Gas; D004595:Electroplating; D004952:Esters / Q000032:analysis*; D006841:Hydrocarbons, Aromatic / Q000032:analysis*; D052578:Ionic Liquids / Q000737:chemistry*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D052617:Solid Phase Microextraction; D013499:Surface Properties
chemical_list: D002227:Carbazoles; D004952:Esters; D006841:Hydrocarbons, Aromatic; D052578:Ionic Liquids; D011108:Polymers; D000644:Quaternary Ammonium Compounds; C009405:tetrabutylammonium
keywords: Aromatic esters; Electrochemical polymerization; Ionic liquids; Polycarbazole; Solid-phase microextraction