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Abstract
Ionic liquid-modified stationary phases are an important class of stationary phase. They have been shown to have a capability of separating various classes of compounds in HPLC. In this review, we focus on the preparation and application of ionic liquid-modified stationary phases in HPLC. First, two common theories of retention mechanism in the ionic liquid-modified stationary phases in HPLC were discussed. Then, the preparations of two important types of stationary phase, ionic liquid-modified and poly(ionic liquids)-grafted silicas, were illustrated. Finally, applications of the ionic liquid-modified stationary phases in HPLC were reviewed, giving regard to the varieties of compounds separated or analyzed.
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ACKNOWLEDGEMENTS
This research was supported by the Basic Science Research Program through the National Research Foundation (NRF) of Korea funded by the Ministry of Education, Science, and Technology (2011-0010673).
Notes
*1–10: Mono-ionic imidazolium-modified silicas; 11–14: Zwitter-ionic imidazolium-modified silicas; 15 and 16: Long-chain imidazolium-modified silicas; 17 and 18: Poly(ionic liquids)-grafted silicas.
