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- W2799978063 abstract "In this study, we applied 1-vinylimidazole (VIM) as the functional monomer to prepare a series of VIM-based monolithic stationary phases for both reversed-phase and hydrophilic interaction capillary liquid chromatography (LC) using various dimethacrylates (EDMA: ethylene dimethacrylate; HDDMA: 1,6-hexanediol dimethacrylate; DDDMA: 1,10-decanediol dimethacrylate) as cross-linkers. With a simple thermally initiated free-radical cross-linking polymerization process, VIM-based monolithic stationary phases have been successfully prepared. The porosity, permeability, and column efficiency of synthesized VIM-based monolithic stationary phases were characterized. With similar total porosity (85–90%), the VIM-HDDMA monoliths showed the lowest permeability among the three sets of VIM-based stationary phases. Various sets of non-polar (alkyl benzenes and polycyclic aromatic hydrocarbons) and polar analytes (phenol derivatives and amphenicol antibiotics) were applied as model compounds to further investigate the retention behavior of the VIM-based monolithic stationary phases for reversed-phase capillary LC analysis using selected VIM-based monolithic columns. While a mixture of organic acids was employed to perform HILIC analysis using the selected VIM-based monolithic columns. The separation selectivity and retention behavior of the VIM-based monolithic stationary phases were compared to those obtained using three previously prepared alkyl methacrylate-based monolithic columns. Strong retention and good resolution of polar analytes (such as phenol derivatives, amphenicol antibiotics, and organic acids) were observed using the selected VIM-based monolithic columns. The strong retention and good resolution might be attributed to the additional hydrogen-bonding between the hydrogen-donating analytes and the hydrogen-accepting imidazolium functionality on the VIM-based stationary phase. The applicability for both reversed-phase and HILIC capillary LC analysis has also been demonstrated using the selected VIM-based monolithic columns." @default.
- W2799978063 created "2018-05-17" @default.
- W2799978063 creator A5025720845 @default.
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- W2799978063 date "2018-09-01" @default.
- W2799978063 modified "2023-09-25" @default.
- W2799978063 title "Preparation and characterization of vinylimidazole-based polymer monolithic stationary phases for reversed-phase and hydrophilic interaction capillary liquid chromatography" @default.
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- W2799978063 doi "https://doi.org/10.1016/j.talanta.2018.05.013" @default.
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