Photopolymerized sol-gel(PSG) columns were prepared using methacryloxypropyltrimethoxysilane as the monomer,toluene as the porogen and hydrochloric acid as the catalyst.Four different photoinitiators such as benzoin m...Photopolymerized sol-gel(PSG) columns were prepared using methacryloxypropyltrimethoxysilane as the monomer,toluene as the porogen and hydrochloric acid as the catalyst.Four different photoinitiators such as benzoin methyl ether,Irgacure 819,Irgacure 1700 and Irgacure 1800 were comparatively used in the reaction solution in the presence and absence of sodium dodecyl sulfate.The above eight solutions were respectively irradiated at 365 nm for 5?10 min in each capillary(75 μm inside diameter) to prepare the porous monolithic sol-gel column by a one-step,in situ,process.The chromatographic behavior of the eight PSG columns were comparatively studied,all of which exhibit reversed-phase character.Using these columns,several neutral compounds,namely thiourea,benzene,toluene,ethyl benzene,biphenyl and naphthalene can be separated from mixtures with a largest column efficiency of 74 470 plate/column for thiourea.Addition of sodium dodecyl sulfate in the polymerization process has a significant influence on the morphology and migration time.展开更多
基金Project(20611140646) supported by the NSFC-KOSEF Scientific Cooperation Program project(2006HANCET-01) supported by Program for New Century Talents of University of Henan Provinceproject(2005-461-140) supported by Program for Backbone Teacher in Henan Province
文摘Photopolymerized sol-gel(PSG) columns were prepared using methacryloxypropyltrimethoxysilane as the monomer,toluene as the porogen and hydrochloric acid as the catalyst.Four different photoinitiators such as benzoin methyl ether,Irgacure 819,Irgacure 1700 and Irgacure 1800 were comparatively used in the reaction solution in the presence and absence of sodium dodecyl sulfate.The above eight solutions were respectively irradiated at 365 nm for 5?10 min in each capillary(75 μm inside diameter) to prepare the porous monolithic sol-gel column by a one-step,in situ,process.The chromatographic behavior of the eight PSG columns were comparatively studied,all of which exhibit reversed-phase character.Using these columns,several neutral compounds,namely thiourea,benzene,toluene,ethyl benzene,biphenyl and naphthalene can be separated from mixtures with a largest column efficiency of 74 470 plate/column for thiourea.Addition of sodium dodecyl sulfate in the polymerization process has a significant influence on the morphology and migration time.
