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Ultraviolet Photoinitiated On-Fiber Copolymerization Of Ionic Liquid Sorbent Coatings For Headspace And Direct Immersion Solid-Phase Microextraction, Tien D. Ho, Honglian Yu, William T.S. Cole, Jared L. Anderson
Ultraviolet Photoinitiated On-Fiber Copolymerization Of Ionic Liquid Sorbent Coatings For Headspace And Direct Immersion Solid-Phase Microextraction, Tien D. Ho, Honglian Yu, William T.S. Cole, Jared L. Anderson
Jared L. Anderson
A high-throughput method for the production of solid-phase microextraction (SPME) sorbent coatings via ultraviolet (UV) photoinitiated copolymerization of ionic liquid (IL) monomers on a fused silica support is described. The copolymerization of monocationic and dicationic IL cross-linkers was performed “on-fiber” using UV initiated free radical polymerization. Mixtures composed of various amounts of the IL cross-linker, UV initiator (DAROCUR 1173), and IL monomer were dip-coated onto an etched and derivatized fused silica support and placed in a high-capacity UV reactor. The method requires no organic dispersive solvent and is much more rapid compared to traditional methods in which polymeric ionic liquid …
Polymeric Ionic Liquids As Co2 Selective Sorbent Coatings For Solid-Phase Microextraction, Qichao Zhao, Jonathan C. Wajert, Jared L. Anderson
Polymeric Ionic Liquids As Co2 Selective Sorbent Coatings For Solid-Phase Microextraction, Qichao Zhao, Jonathan C. Wajert, Jared L. Anderson
Jared L. Anderson
Two polymeric ionic liquids (PIL) were synthesized and employed as sorbent coatings in solid-phase microextraction (SPME) for the selective extraction of CO2. The two coatings, poly(1-vinyl-3-hexylimidazolium) bis[(trifluoromethyl)sulfonyl]imide [poly(VHIM-NTf2)] and poly(1-vinyl-3-hexylimidazolium) taurate [poly(VHIM-taurate)], exhibited varied selectivity toward CO2 due to functional groups within in the PIL that imparted different mechanisms of CO2 capture. Extraction efficiencies were compared to those of two commercial SPME fibers [poly(dimethylsiloxane) (PDMS) and Carboxen−PDMS]. The poly(VHIM-NTf2) PIL fiber exhibited comparable extraction efficiency at high CO2 pressure compared to the Carboxen−PDMS fiber, even though the PIL-based fibers possessed much smaller film thicknesses. Calibration curves generated in pure CO2 …