Poly(amidoamine)(PAMAM) dendrimer has a large number of terminal groups which can be functionalized by different kinds of ligands.A novel open-tubular CEC(OT-CEC) column in which BSA was bonded to inner wall of capill...Poly(amidoamine)(PAMAM) dendrimer has a large number of terminal groups which can be functionalized by different kinds of ligands.A novel open-tubular CEC(OT-CEC) column in which BSA was bonded to inner wall of capillary as stationary phase through different generations of PAMAM dendrimer was developed.The obtained columns were characterized via labelling BSA with fluorescein isothiocyanate(FITC).Under the optimized condition,the resolution of D,L-Trp was gradually improved with the increase of PAMAM generation.By OT-CEC column modified with BSA-G3.0-PAMAM,the baseline separation of D,L-Trp can be obtained.展开更多
This paper covers the preparation of a sol gel derived macrocyclic dioxopolyamine(1,4,7,10 tetraazaclotridecane 11,13 dione) stationary phase for open tubular capillary electrochromatography(OTCEC). The sol gel derive...This paper covers the preparation of a sol gel derived macrocyclic dioxopolyamine(1,4,7,10 tetraazaclotridecane 11,13 dione) stationary phase for open tubular capillary electrochromatography(OTCEC). The sol gel derived macrocyclic dioxopolyamine capillary columns have shown improved separations of neurotransmitters, isomeric nitrophenols, isomeric dihydroxybenzenes, isomeric aminophenols, isomeric diaminobenzenes and three ortho halogen anilines, in comparison with those of untreated capillaries. The characteristics of the sol gel derived macrocyclic dioxopolyamine capillary columns are compared with the capillary column modified with the macrocyclic dioxopolyamine by chemically bonded method after etching. The sol gel method provided a porous silica material with stationary phase in place within the same experimental procedure. This provided speedy fabrications of high efficiency columns with high surface area and improved phase ratio. We achieved high efficiencies of 60 000-340 000 plates/m for the various isomeric compounds. The reproducibility migration time and the plate number were pretty good.展开更多
文摘Poly(amidoamine)(PAMAM) dendrimer has a large number of terminal groups which can be functionalized by different kinds of ligands.A novel open-tubular CEC(OT-CEC) column in which BSA was bonded to inner wall of capillary as stationary phase through different generations of PAMAM dendrimer was developed.The obtained columns were characterized via labelling BSA with fluorescein isothiocyanate(FITC).Under the optimized condition,the resolution of D,L-Trp was gradually improved with the increase of PAMAM generation.By OT-CEC column modified with BSA-G3.0-PAMAM,the baseline separation of D,L-Trp can be obtained.
文摘This paper covers the preparation of a sol gel derived macrocyclic dioxopolyamine(1,4,7,10 tetraazaclotridecane 11,13 dione) stationary phase for open tubular capillary electrochromatography(OTCEC). The sol gel derived macrocyclic dioxopolyamine capillary columns have shown improved separations of neurotransmitters, isomeric nitrophenols, isomeric dihydroxybenzenes, isomeric aminophenols, isomeric diaminobenzenes and three ortho halogen anilines, in comparison with those of untreated capillaries. The characteristics of the sol gel derived macrocyclic dioxopolyamine capillary columns are compared with the capillary column modified with the macrocyclic dioxopolyamine by chemically bonded method after etching. The sol gel method provided a porous silica material with stationary phase in place within the same experimental procedure. This provided speedy fabrications of high efficiency columns with high surface area and improved phase ratio. We achieved high efficiencies of 60 000-340 000 plates/m for the various isomeric compounds. The reproducibility migration time and the plate number were pretty good.
