Chitosan-silica hybrid-coated open tubular column for hydrophilic interaction capillary electrochromatography.
A novel and convenient protocol for the preparation of an open-tubular column coated with chitosan-silica hybrid using chitosan and silane-coupling agent (γ-glycidoxy-propyltrimethoxysilane) was developed for CEC, in which, chitosan was covalently bonded to the inner wall of a fused-silica capillary using γ-glycidoxy-propyltrimethoxysilane as a cross-linking agent. The stationary phase was hydrophilic due to the chitosan-silica hybrid with abundant amine and hydroxyl functional groups. The chromatographic characteristics of the column were evaluated by the separation of some organic acids and inorganic anions. The column showed good selectivity for nucleotides, aromatic acids, and inorganic anions. The mechanism for the separation of these compounds was primarily based on the hydrophilic and electrostatic interactions combined with the electrophoretic mechanism. The CEC method on the column for the separation of these compounds was compared with CE method in a bare capillary.
Ministry of Education Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, PR China.
Jinmei
J
Hu
Lili
L
Yin
Li
L
Jia
D053801:Capillary Electrochromatography / Q000295:instrumentation* / Q000379:methods*; D048271:Chitosan / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D009930:Organic Chemicals / Q000737:chemistry / Q000302:isolation & purification; D012822:Silicon Dioxide / Q000737:chemistry*
D009930:Organic Chemicals; D012822:Silicon Dioxide; D048271:Chitosan