title: Novel proton-type ionic liquid doped polyaniline for the headspace solid-phase microextraction of amines.
abstract: A novel proton-type ionic liquid doped polyaniline (HIL-doped PANI) coating was presented, which was prepared on a stainless steel wire by electrodeposition in an aqueous solution containing aniline and 1-sulfobutyl-3-methylimidazolium hydrosulfate. The HIL-doped PANI coating showed granular nanostructure and had large specific surface. When it was applied to the headspace solid-phase microextraction of several amines (i.e., aniline, N-methylaniline, 3-methylaniline, 2-chloroaniline and 3-chloroaniline), it showed high extraction efficiency. The enrichment factors were 191.8-343.9 for different amines, much higher than those of common PANI and commercial polydimethylsiloxane/divinylbenzene coatings. Coupled with gas chromatographic analysis, the linear ranges were 0.097-100 μg/L with correlation coefficients above 0.9942, and the detection limits were 0.012-0.048 μg/L (S/N=3) for different amines. The relative standard deviations (RSD) were smaller than 8.1% for five successive measurements with single fiber and the fiber-to-fiber RSDs were 8.6-13.8% (n=5) for these amines. The proposed method was successfully applied to the extraction and determination of amines in organic waste water samples, and the recoveries were 78.3-112.8% for different analytes.
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China; Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials & Key Laboratory for the Synthesis and Application of Organic Functional Molecules (Ministry of Education), College of Chemistry & Chemical Engineering, Hubei University, Wuhan 430062, PR China.
authors.forename: Youhong
authors.initials: Y
authors.lastname: Ai
authors.affiliation: Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 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 430072, PR China. Electronic address: bzzeng@whu.edu.cn.
authors.forename: Baizhao
authors.initials: B
authors.lastname: Zeng
mesh_terms: D000588:Amines / Q000032:analysis* / Q000302:isolation & purification; D000814:Aniline Compounds / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D002849:Chromatography, Gas; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D057230:Limit of Detection; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D011522:Protons; D052617:Solid Phase Microextraction; D013499:Surface Properties; D013696:Temperature; D062065:Wastewater / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D000588:Amines; D000814:Aniline Compounds; D052578:Ionic Liquids; D011522:Protons; D062065:Wastewater; D014874:Water Pollutants, Chemical; C416807:polyaniline; C031392:3-chloroaniline; C025257:2-chloroaniline; C023650:aniline; C021313:methylaniline
keywords: Amines; Electropolymerization; Ionic liquid; Polyaniline; Solid phase microextraction