NDLI: New zwitterionic polymethacrylate monolithic columns for one- and two-dimensional microliquid chromatography.

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New zwitterionic polymethacrylate monolithic columns for one- and two-dimensional microliquid chromatography.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Jandera, Pavel Stanková, Magda Hájek, Tomás
Description	Country affiliation: Czech Republic Author Affiliation: Jandera P ( Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Pardubice, Czech Republic.)
Abstract	We prepared 0.53 and 0.32 mm id monolithic microcolumns by in situ copolymerization of a zwitterionic sulfobetaine functional monomer with bisphenol A glycerolate dimethacrylate (BIGDMA) and dioxyethylene dimetacrylate crosslinkers. The columns show a dual retention mechanism (hydrophilic-interaction mode) in acetonitrile-rich mobile phases and RP in highly aqueous mobile phases. The new 0.53 mm id columns provided excellent reproducibility, retention, and separation selectivity for phenolic acids and flavonoids. The new zwitterionic monolithic columns are highly orthogonal, with respect to alkyl silica stationary phases, not only in the hydrophilic-interaction mode but also in the RP mode. The optimized monolithic zwitterionic microcolumn of 0.53 mm id was employed in the first dimension, either in the aqueous normal-phase or in the RP mode, coupled with a short nonpolar core-shell column in the second dimension, for comprehensive 2D LC separations of phenolic and flavonoid compounds. When the 2D setup with the sulfobetaine-BIGDMA column was used for repeated sample analysis, with alternating gradients of decreasing (hydrophilic-interaction mode), and increasing (RP mode) concentration of acetonitrile on the sulfobetaine-BIGDMA column in the first dimension, useful complementary information on the sample could be obtained.
File Format	HTM / HTML
ISSN	16159306
Issue Number	15
Volume Number	36
e-ISSN	16159314
Journal	Journal of Separation Science
Language	English
Publisher	Wiley-VCH
Publisher Date	2013-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Analytical Discipline Chemistry Polymethacrylic Acids Chemistry Benzhydryl Compounds Betaine Analogs & Derivatives Chromatography, Liquid Molecular Structure Phenols Polymerization Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Filtration and Separation

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