With surfactant P123 as structure directing reagent, 1, 2-bis (trimethoxysilyl) ethane was
hydrolyzed under acid condition. The resulting ethane-bridged silica was coated onto the inner
walls of fused silica capillaries and used as the stationary phase for capillary electrochromatography.
The bridged ethyl silica provided hydrophobic groups for reversed-phase separation.
A comparative coated capillary was fabricated without the use of surfactant in the preparation
of the bonded silica. Separation of model neutral compounds was compared between these two
kinds of capillaries. Surfactant-assisted organosilica-coated capillaries displayed much superior
retention efficiency without obviously decreased electroosmotic flow. The existence of surfactant
in the synthesis of the sol results in higher surface areas of the coating. Such ethane-bridged
organosilica stationary phases can be used under basic conditions. GX毛细管电泳仪(紫外检测)CL1030
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