Periodic mesoporous organosilica with ionic liquid framework as a novel fiber coating for headspace solid-phase microextraction of polycyclic aromatic hydrocarbons

Mir Mahdi Abolghasemi; Babak Karimi; Vahid Yousefi

doi:10.1016/j.aca.2013.10.022

Periodic mesoporous organosilica with ionic liquid framework as a novel fiber coating for headspace solid-phase microextraction of polycyclic aromatic hydrocarbons

Anal Chim Acta. 2013 Dec 4:804:280-6. doi: 10.1016/j.aca.2013.10.022. Epub 2013 Oct 21.

Authors

Mir Mahdi Abolghasemi¹, Babak Karimi, Vahid Yousefi

Affiliation

¹ Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran. Electronic address: mehdiabolghasemi@gmail.com.

PMID: 24267094
DOI: 10.1016/j.aca.2013.10.022

Abstract

Periodic mesoporous organosilica based on alkylimidazolium ionic liquid (PMO-IL) was prepared and used as a highly porous fiber coating material for solid-phase microextraction (SPME). The prepared nanomaterial was immobilized onto a stainless steel wire for fabrication of the SPME fiber. The fiber was evaluated for the extraction of some polycyclic aromatic hydrocarbons (PAHs) from aqueous sample solutions in combination with gas chromatography-mass spectrometry (GC-MS). A one at-the-time optimization strategy was applied for optimizing the important extraction parameters such as extraction temperature, extraction time, ionic strength, stirring rate, and desorption temperature and time. In optimum conditions, the repeatability for one fiber (n=3), expressed as relative standard deviation (R.S.D.%), was between 4.3% and 9.7% for the test compounds. The detection limits for the studied compounds were between 4 and 9 pg mL(-1). The developed method offers the advantage of being simple to use, with shorter analysis time, lower cost of equipment, thermal stability of fiber and high relative recovery in comparison to conventional methods of analysis.

Keywords: Gas chromatography–mass spectrometry; Ionic liquid; Periodic mesoporous organosilica; Polycyclic aromatic hydrocarbons; Solid phase microextraction.