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Preparation of particle-fixed silica monoliths used in capillary electrochromatography

✍ Scribed by Qishu Qu; Xiaoqing Tang; Chengyin Wang; Gongjun Yang; Xiaoya Hu; Xiao Lu; Yin Liu; Chao Yan

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
774 KB
Volume
29
Category
Article
ISSN
1615-9306

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✦ Synopsis

Abstract

Fused‐silica capillaries were packed with porous 1 μm 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 in situ 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 (about 125 200 plates/m) was obtained by using these new types of columns.

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