title: Effects of inner diameter of monolithic column on separation of proteins in capillary-liquid chromatography.
abstract: Polymer monolithic columns with I.D. between 100 and 320 microm were prepared by in-situ polymerization of styrene and divinylbenzene in fused silica capillaries. The effects of monolithic column I.D. on the separation of proteins in reversed-phase capillary-liquid chromatography under gradient elution were systemically studied. The loading capacity was positively proportional to the volume of the stationary phase. It was found that the smaller diameter columns showed better performance for protein separation. The minimum plate height decreases from 34.99 microm (320 microm I.D. column) to 5.39 microm (100 microm I.D. column) for a retained protein. After studying the three parameters of the Van Deemter equation, it was interpreted that the smaller diameter can provide less flow resistance and the better performance may also be improved by the increasing of the effective diffusion. This conclusion was also supported by the data of separation permeability and breakthrough curves.
authors.affiliation: Department of Environmental Science & Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China.
authors.forename: Congying
authors.initials: C
authors.lastname: Gu
authors.forename: Li
authors.initials: L
authors.lastname: Lin
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Chen
authors.forename: Jinping
authors.initials: J
authors.lastname: Jia
authors.forename: Jicun
authors.initials: J
authors.lastname: Ren
authors.forename: Nenghu
authors.initials: N
authors.lastname: Fang
mesh_terms: D053801:Capillary Electrochromatography / Q000295:instrumentation* / Q000379:methods; D005591:Chemical Fractionation / Q000295:instrumentation* / Q000379:methods; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004058:Diffusion; D057927:Hydrophobic and Hydrophilic Interactions; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D011137:Polystyrenes / Q000138:chemical synthesis / Q000737:chemistry; D016062:Porosity; D011506:Proteins / Q000737:chemistry* / Q000302:isolation & purification*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013053:Spectrophotometry / Q000379:methods
chemical_list: D011137:Polystyrenes; D011506:Proteins; D012997:Solvents; C432006:divinylbenzene-polystyrene copolymer; D012822:Silicon Dioxide