Properties of columns with several pyridinium and imidazolium ionic liquid stationary phases.
作者： M.V. Shashkov , V.N. Sidelnikov
DOI: 10.1016/J.CHROMA.2013.08.030
关键词: Work (thermodynamics) 、 Intermolecular force 、 Polar 、 Ring (chemistry) 、 Pyridinium 、 Selectivity 、 Ionic liquid 、 Chemistry 、 Chromatography 、 Theoretical plate
摘要: Abstract Recent advances in the development of new liquid phases (ILs) made it possible to use some classes ILs as polar stationary (SLP). In our days only alkylimidazolium- and alkylphosphonium-based are widely used SLP. present work other types – pyridinium cyanopropyl/hydroxypropyl imidazolium were investigated Columns with efficiencies 2000–2500 plates/m by high-pressure static method prepared. Polarity selectivity these measured. Selectivity was described terms intermolecular interactions using Abraham solvatation parameter model. The set regularities between cation structure ionic has been shown. number position methyl groups ring shown have sufficient influence on all type molecular interactions. Finally resolutions test mixture for several SLP obtained. For columns liquids dependencies height equivalent a theoretical plate (HETP) sample loading capacity obtained compared conventional phases. It found that optimal efficiency IL is attained at lower carrier gas velocities comparison traditional Nevetheless comparable those GC
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