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Poly(N-vinylimidazole)-grafted capillary for electrophoresis prepared by surface-initiated atom transfer radical polymerization.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Li, Jing Han, Haifeng Wang, Qing Liu, Xia Jiang, Shengxiang
Description	Author Affiliation: Li J ( Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, P. R. China.)
Abstract	A CE method for poly(N-vinylimidazole) (PVI)-grafted capillaries by the surface-initiated atom transfer radical polymerization has been developed. The coating was prepared with N-vinylimidazole as the monomer, 2-bromo-2-methyl-N-[3-(triethoxysilyl) propyl] propanamide (BTPAm) as the initiator and CuCl/CuCl(2)/2,2'-bipyridine as the catalyst and ligand. The direction and magnitude of EOF in the PVI-grafted capillary were investigated in a pH range of 3.0-9.0. The results indicated that the EOF could be modulated by varying the pH value of the buffer and an anodic EOF was obtained at pH values below 6.5. A significant improvement in reproducibility and reduction of EOF appeared on the PVI-grafted capillary when compared with the uncoated capillary. Furthermore, the polymer coated capillaries were applied to the separations of the inorganic anions, organic acids and basic proteins and baseline separations were achieved with short analysis time and high reproducibility.
File Format	HTM / HTML
ISSN	16159306
Issue Number	17-18
Volume Number	33
e-ISSN	16159314
Journal	Journal of Separation Science
Language	English
Publisher	Wiley-VCH
Publisher Date	2010-09-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Analytical Discipline Chemistry Electrophoresis, Capillary Imidazoles Chemistry Polymers Acids Isolation & Purification Anions Instrumentation Methods Molecular Structure Organic Chemicals Proteins Reproducibility Of Results Silicon Dioxide Evaluation Studies 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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