Preparation of particle-fixed silica monoliths used in capillary electrochromatography.
Fused-silica capillarieswere packed with porous 1 microm bare silica microspheres and immobilized by potassium silicate-formamide in order to obtain columns with silica-based monolithic packing. After curing, the particle-fixed monolithic columns were octadecylated insitu with dimethyloctadecylchlorosilane. The columns were mechanically strong and permeable. No noticeable loss in efficiency was found after using a column continuously for 1 month. The performances of the particle-fixed silica monolithic columns were evaluated for CEC under RP conditions. High separation efficiency (about125 200 plates/m) was obtained by using these new types of columns.
Qu
Qishu
Q
Jiangsu Key Laboratory of Environmental Materials and Environmental Engineering, College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, China. quqishu@gmail.com
Tang
Xiaoqing
X
Wang
Chengyin
C
Yang
Gongjun
G
Hu
Xiaoya
X
Lu
Xiao
X
Liu
Yin
Y
Yan
Chao
C