title: Novel covalently coated diazoresin/polyvinyl alcohol capillary column for the analysis of proteins by capillary electrophoresis.
abstract: A novel method for the preparation of covalently linked capillary coatings of PVA was demonstrated using photosensitive diazoresin (DR) as coupling agents. Layer-by-layer self-assembly film of DR and PVA based on hydrogen bonding was first fabricated on the inner wall of capillary, then the hydrogen bonding was converted into covalent bonding after treatment with UV light through the unique photochemistry reaction of DR. The covalently bonded coatings suppressed basic protein adsorption on the inner surface of capillary, and thus a baseline separation of lysozyme, cytochrome c and BSA was achieved using CE. Compared with bare capillary or noncovalently bonded DR/PVA coatings, the covalently linked DR/PVA capillary coatings not only improved the CE separation performance for proteins, but also exhibited good stability and repeatability. Due to the replacement of highly toxic and moisture-sensitive silane coupling agent by DR in the covalent coating preparation, this method may provide a green and easy way to make the covalently coated capillaries for CE.
authors.affiliation: College of Chemical and Environmental Engineering, Qingdao University, Qingdao, P. R. China. yubing198@qdu.edu.cn
authors.forename: Bing
authors.initials: B
authors.lastname: Yu
authors.forename: Peng
authors.initials: P
authors.lastname: Liu
authors.forename: Hailin
authors.initials: H
authors.lastname: Cong
authors.forename: Jianguo
authors.initials: J
authors.lastname: Tang
authors.forename: Lixin
authors.initials: L
authors.lastname: Zhang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D053841:Electroosmosis; D019075:Electrophoresis, Capillary / Q000295:instrumentation* / Q000379:methods; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D011506:Proteins / Q000032:analysis*; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet; D013499:Surface Properties
chemical_list: D001391:Azo Compounds; D011506:Proteins; C504851:diazoresin; D011142:Polyvinyl Alcohol