Tuning the extraction properties of ionogel-coated Solid-phase microextraction fibers based on the solvation properties of the ionic liquids

摘要

A silica-based network was used to immobilize ionic liquid-based ionogels and applied as a fiber coating for solid-phase microextraction (SPME). The ionogels were prepared by a sol-gel process, using two ionic liquids, triethylsulfonium bis(trifluoromethylsulfonyl)imide ([Set(3)][TFSI]) and 1-butyl-1-methylpiperidinium bis(trifluoromethylsulfonyl)imide ([C(4)C(1)Pip] [TFSI]), as well as their equimolar mixture. Methyltrimethoxysilane was used as the sol-gel precursor, and trifluoroacetic acid as a reaction catalyst.