期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1218, 期 6, 页码 833-841出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2010.12.036
关键词
Gas chromatography; Stationary phase; Ionic liquid; Polysiloxane
资金
- National Nature Science Foundation of China [20775056, 20835004]
Due to the special performance of dual nature and synthetic flexibility, ionic liquids (ILs) have been an attractive research subject of stationary phases for gas chromatography (GC). In this work, a novel ionic liquid (IL) bonded polysiloxane ([PSOMIM][NTf2]) with anion of bis-trifluoromethanesulfonylimide (NTf2-) was synthesized, and another one with chloride anion ([PSOMIM][CI]) was also prepared for the purpose of comparison. The thermo-stability of the product was evaluated by thermogravimetric (TG) test and the result indicated that [PSOMIM][NTf2] did not decompose slightly until 380 degrees C. Then the solvation behaviors of the ILs were characterized using solvation parameter model. Subsequently, [PSOMIM][NTf2] and [PSOMIM][CI] were used as stationary phases to prepare capillary columns for GC, respectively. The column efficiency of [PSOMIM][NTf2] column was 4776 plates/m (k = 3.64 +/- 0.08, naphthalene), and that of the other one was 3170 plates/m (k = 2.84 +/- 0.11, naphthalene). The selectivity of the novel stationary phases for analytes, including Grob reagent, aromatic positional isomers was further evaluated. Furthermore, the chromatograms of n-alkanes and polycyclic aromatic hydrocarbons (PAHs) on [PSOMIM][NTf2] column were compared with that on [PSOMIM][CI] column. [PSOMIM][NTf2] stationary phase also exerted good selectivity for fatty acid methyl esters (FAMEs), polychlorinated biphenyls (PCBs) and aromatic amines. (C) 2010 Elsevier B.V. All rights reserved.
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