Poly(ionic liquid) embedded particles as efficient solid phase microextraction phases of polar and aromatic analytes

TALANTA

卷:198

Article

Patinha, David J. S.^1,2,3  Nellepalli, Pothanagandhi⁴  Vijayakrishna, Kari^4,5  Silvestre, Armando J. D.^2,3  Marrucho, Isabel M.^1,6 

[1] Univ Nova Lisboa, Inst Tecnol Quim & Biol Antonio Xavier, P-2780157 Oeiras, Portugal

[2] Univ Aveiro, Aveiro Inst Mat, CICECO, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Dept Chem, P-3810193 Aveiro, Portugal

[4] VIT Univ, Sch Adv Sci, Dept Chem, Vellore, Tamil Nadu, India

[5] Indian Inst Technol Bhubaneswar, Sch Basic Sci, Khurja 752050, Odisha, India

[6] Univ Lisbon, Inst Super Tecn, Ctr Quim Estrutural, Ave Rovisco Pais, P-1049001 Lisbon, Portugal

关键词: Solid phase microextraction;    Poly(ionic liquids);    Increased Surface Area;    BTEX;    Alcohols;    Gas chromatography;   

DOI  :  10.1016/j.talanta.2019.01.106

来源: Elsevier

【 摘 要 】

In this work, a facile preparation of SPME fibers with increased surface area is presented. The SPME fibers were prepared by grinding poly(ionic liquids) (PILs) to obtain particles of 1-16 mu m and, with the aid of a silicon adhesive, attach these particles to a steel wire support. Three different PILs, poly(1-vinyl-3-benzylimidazoliumco-styrene bromide) [poly(ViBnIm-co-Sty Br)], poly(1-vinyl-3-benzylimidazolium-co-styrene bis(trifluoromethanesulfonyl)imide) [poly(Pyrr(11) TFSI)] and poly(diallyldimethylamine bis(trifluoromethanesulfonyl)imide) TFSI)], were used. The first two PILs were obtained by reversible addition-fragmentation chain transfer polymerization followed by metathesis reactions. The thicknesses of the prepared fibers were found to be 19 +/- 4 mu m and 85% of the particles used have diameters between 2 and 10 mu m. The prepared fibers were tested by performing the headspace extraction of two standard solutions, one containing a mixture of alcohols with different chain lengths, and the other a mixture of aromatic compounds, leading to sorption times of 10-15 min due the large surface area attained with this method. PILs with aromatic moieties containing the bromide anion showed high selectivity towards polar compounds, due to the hydrogen basicity of the anion, and also towards aromatic analytes, due to the aromatic nature of styrene moieties and the cation pendant groups. The limits of detection fall in the sub ppb level, while relative standard deviations and reproducibility from fiber-to-fiber found maximums of 16.2% and 22.5%, respectively. Furthermore, the PIL based fibers showed up to 90% higher extraction efficiencies compared to the commercial fibers of polydimethylsiloxane and polyacrylate.

【 授权许可】

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