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Type: Artigo de periódico
Title: Insight into the extraction mechanism of polymeric ionic liquid sorbent coatings in solid-phase microextraction
Author: Ho, TD
Cole, WTS
Augusto, F
Anderson, JL
Abstract: An investigation into the mechanism of extraction for polymeric ionic liquid (PIL)-based solid phase microextraction sorbent coatings is described. Four PIL-based coatings, namely, a poly(1-4-vinylbenzyl)-3-hexadecylimidazolium bisKtrifluoromethyl)sulfonyl] imide (poly([VBHDIM][NTf2])) PIL produced through 2,2'-azo-bis(isobutyronitrile) (AIBN) initiated free-radical polymerization, a UV-initiated poly(1-vinyl-3-hexylimidazolium) chloride (poly([VHIM][Cl]))PIL, and two crosslinked PILs containing the same IL monomers copolymerized with dicationic IL crosslinkers, were investigated. Calibration curves of 1-octanol were plotted in the presence of naphthalene, a model interfering compound, to observe changes in the linear range, sensitivity, and amount of analytes extracted. Results were compared with a polydimethylsiloxane/divinylbenzene (PDMS/DVB) coating and a polyacrylate (PA) coating which are known to extract analytes primarily through adsorption and partitioning mechanisms, respectively. All PIL-based coatings extracted analytes via a non-competitive partitioning mechanism regardless of the extent of crosslinking. (C) 2013 Elsevier B.V. All rights reserved.
Subject: Ionic liquids
Polymeric ionic liquids
Solid-phase microextraction
Gas chromatography
Country: Holanda
Editor: Elsevier Science Bv
Citation: Journal Of Chromatography A. Elsevier Science Bv, v. 1298, n. 146, n. 151, 2013.
Rights: fechado
Identifier DOI: 10.1016/j.chroma.2013.05.009
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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