Abstract: A new type of stationary phase for capillary electrochromatography (CEC), immobilized SE-30 coated silica gel, was developed and the columns packed with this new phase were prepared and evaluated. It was found that this phase could be used to make frits for the micro-columns as well as to pack the bulk of the column. By sticking together the particles in the whole of the column bed, this new packing resulted in columns with stable performance, even under rigorous conditions: more than 380 consecutive separations were effected with these columns with the mobile phase pH of 11.7.

Key words: Capillary electrochromatography, SE-30 coated ODS stationary phase, Crosslinking