| Title: | Ionogel fibres of bis(trifluoromethanesulfonyl)imide anion-based ionic liquids for the headspace solid-phase microextraction of chlorinated organic pollutants |
| Author(s): | Pena-Pereira F; Marcinkowski L; Kloskowski A; Namiesnik J; |
| Address: | "Department of Analytical Chemistry, Chemical Faculty, Gdansk University of Technology (GUT), ul. G. Narutowicza 11/12, 80-233 Gdansk, Poland" |
| ISSN/ISBN: | 1364-5528 (Electronic) 0003-2654 (Linking) |
| Abstract: | "Ionogels, a family of hybrid materials in which ionic liquids (ILs) are confined in a sol-gel network, are receiving much attention in a variety of scientific and technological fields. In this work, ionogels derived from three different ILs based on the anion bis(trifluoromethanesulfonyl)imide (TFSI), namely 1-butyl-3-methylpyridinium bis(trifluoromethanesulfonyl)imide ([C4C1Py][TFSI]), 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide ([C4C1Pyrr][TFSI]), and 1-butyl-1-methylpiperidinium bis(trifluoromethanesulfonyl)imide ([C4C1Pip][TFSI]) were obtained on the outer surface of optical fibres by sol-gel technology. The obtained hybrid materials were characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectrometry (EDX), and subsequently evaluated as sorbent coatings for the headspace solid-phase microextraction (HS-SPME) of volatile chlorinated organic compounds in combination with gas chromatography with barrier ionization discharge detection (GC-BID). The ionogel based on [C4C1Pyrr][TFSI] exhibited the highest extractability for target analytes. The experimental parameters that affect the extraction process were optimized by means of a central composite design. Under optimal conditions, the proposed method yielded excellent enrichment factors (EFs) in the range 3889-20 919 and limits of detection (LODs) between 11 and 151 ng L(-1) for the target compounds. The inter-day repeatability, intra-day reproducibility and fibre-to-fibre reproducibility, were less than 8.5, 9.6 and 16.9%, respectively. Finally, the developed method was applied to the analysis of water samples, showing recovery values in the range 95-106%" |
| Notes: | "PubMed-not-MEDLINEPena-Pereira, F Marcinkowski, L Kloskowski, A Namiesnik, J eng England 2015/09/15 Analyst. 2015 Nov 7; 140(21):7417-22. doi: 10.1039/c5an01337b" |
