Thermostable Columns Based on Ionic Liquids for the Analysis of Hydrocarbon Mixtures by Two-Dimensional Chromatography
Protection of Metals and Physical Chemistry of Surfaces
, E-ISSN: 2070-206X
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Lavrentieva 5, Novosibirsk, 630090 Russia
Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia
We studied thermostable capillary columns with stationary phases based on ionic liquids (IL) as the second columns in two-dimensional chromatography. The use of dicationic imidazolium and pyridinium ILs was shown to provide higher working temperatures compared to conventional polar phases (up to 280–300°C), which allows qualitative separations of high-boiling hydrocarbon mixtures, for example, catalytic gas oil with bp up to 400°C. It was shown also that a higher selectivity of separation between the groups of aromatic hydrocarbons compared to the commonly used polyethylene glycol-based polar phase can be achieved on such columns.