A capillary gas chromatographic analysis of the characteristics of ionic liquid films

摘要

Ionic liquid films are a promising material for the preparation of capillary columns in gas chromatography because they provide new opportunities for chromatographic analysis. In this work the properties of ionic liquid films are studied by capillary gas chromatography. Ionic liquids based on 4-methylpyridinium cation and also 1,2-dimethylimidazolium cations are analyzed. For comparison the Carbowax 20M polyethylene glycol film is used. Diffusion properties are studied by determining the dependence of the height equivalent to a theoretical plate on the carrier gas rate. It turns out that the films based on ionic liquids are characterized by shorter diffusion times in comparison with polyethylene glycol. The loading capacity of the films for which ionic liquids proved to be comparable with polyethylene glycol is also determined in the work.