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A novel electroneutral and polar silica-based hybrid monolith was developed by an in situ copolymerization of 2-hydroxyethylmethacrylate (HEMA) and polyhedral oligomeric silsesquioxane methacryl substituted (POSS-MA), and successfully employed for hydrophilic interaction capillary electrochromatography (HI-CEC). A good mechanical stability of the prepared monolith was gained with the permeability decreasing from 6.52×10-14m2 to 4.61×10-14m2 when mobile phase changed from ACN to water. A significant cathodal EOF was obtained through attracting ions from the mobile phase despite the fact that it was devoid of ionizable functional groups on the surface of stationary phases, and a typical HI-CEC mechanism was achieved. The morphologies of the hybrid silica-based monolithic matrixes were observed, and the performance of this silica-based hybrid monolith was also investigated. Satisfactory column performances were carried out for both the neutral and charged analytes with HI-CEC. The analytes including uncharged amides and phenols, charged nucleic acid bases and nucleosides and enkephalins, were well separated with good peak symmetry. High separation efficiencies of charged alkaloids and enkephalins could get up to 145,000plates/m and 75,000plates/m, respectively. © 2012 Elsevier B.V.
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Journal of Chromatography A
ISSN: 0021-9673
Year: 2012
Volume: 1260
Page: 174-182
4 . 6 1 2
JCR@2012
3 . 8 0 0
JCR@2023
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 0
SCOPUS Cited Count: 25
ESI Highly Cited Papers on the List: 0 Unfold All
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Chinese Cited Count:
30 Days PV: 1
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