title: Preparation of highly efficient monolithic silica capillary columns for the separations in weak cation-exchange and HILIC modes.
abstract: Weak cation-exchange (WCX) and HILIC modes columns were prepared by on-column polymerization of acrylic acid on monolithic silica capillary columns modified with N-(3-triethoxysilylpropyl)methacrylamide anchor groups. The polymer-coated columns could be used for HILIC mode separation of pyridylamino (PA)-sugars and peptides including a tryptic digest of BSA, while for weak cation-exchange mode for the separation of proteins and nucleosides even at high linear velocity. The poly(acrylic acid) coated monolithic silica capillary columns showed greater retention toward PA-sugars than a polyacrylamide coated monolithic silica capillary columns prepared in the same manner. Proteins and nucleosides were separated effectively at pH 6.9 using the same column. The column provided fair permeability after the polymer-coating step. High-speed separation of proteins at u=4.66 mm/s with high efficiency was shown to be possible, while high-speed separation of nucleosides has achieved within one minute using the column at u=8.67 mm/s, suggesting that the column will be suitable for the second dimension separation of multidimensional HPLC systems.
authors.affiliation: Department of Biomolecular Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan. ikegami@kit.ac.jp
authors.forename: Tohru
authors.initials: T
authors.lastname: Ikegami
authors.forename: Kanta
authors.initials: K
authors.lastname: Horie
authors.forename: Jafariah
authors.initials: J
authors.lastname: Jaafar
authors.forename: Ken
authors.initials: K
authors.lastname: Hosoya
authors.forename: Nobuo
authors.initials: N
authors.lastname: Tanaka
mesh_terms: D000180:Acrylic Resins; D000606:Amino Sugars / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002852:Chromatography, Ion Exchange / Q000379:methods*; D020099:Coated Materials, Biocompatible; D006863:Hydrogen-Ion Concentration; D010455:Peptides / Q000302:isolation & purification; D012822:Silicon Dioxide
chemical_list: D000180:Acrylic Resins; D000606:Amino Sugars; D020099:Coated Materials, Biocompatible; D010455:Peptides; C006903:carbopol 940; D012822:Silicon Dioxide