Expanding the applicability of poly(Ionic Liquids) in solid phase microextraction: Pyrrolidinium coatings

David J.S. Patinha, Liliana C. Tomé, Mehmet Isik, David Mecerreyes, Armando J.D. Silvestre, Isabel M. Marrucho

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Crosslinked pyrrolidinium-based poly(ionic liquids) (Pyrr-PILs) were synthesized through a fast, simple, and solventless photopolymerization scheme, and tested as solid phase microextraction (SPME) sorbents. A series of Pyrr-PILs bearing three different alkyl side chain lengths with two, eight, and fourteen carbons was prepared, characterized, and homogeneously coated on a steel wire by using a very simple procedure. The resulting coatings showed a high thermal stability, with decomposition temperatures above 350 °C, excellent film stability, and lifetime of over 100 injections. The performance of these PIL-based SPME fibers was evaluated using a mixture of eleven organic compounds with different molar volumes and chemical functionalities (alcohols, ketones, and monoterpenes). The Pyrr-PIL fibers were obtained as dense film coatings, with 67 μm thickness, with an overall sorption increase of 90% and 55% as compared to commercial fibers of Polyacrylate (85 μm) (PA85) and Polydimethylsiloxane (7 μm) (PDMS7) coatings, respectively. A urine sample doped with the sample mixture was used to study the matrix effect and establish relative recoveries, which ranged from 60.2% to 104.1%.

Original languageEnglish
Article number1094
JournalMaterials
Volume10
Issue number9
DOIs
Publication statusPublished - 18 Sep 2017

Keywords

  • Fibers
  • Gas chromatography
  • Poly(ionic liquids)
  • Solid phase microextraction
  • Steel coatings
  • UV-photopolymerization

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