Stationary phase structures enhancing electroosmotic flow in capillary electrochromatography

摘要: Several chemically bonded silicas with C18 groups were examined respect to electroosmotic flow (EOF) velocities under CEC conditions. Stationary phases low hydrophobic selectivity generally provided high EOFs. The stationary prepared by using octadecyltrichlorosilane showed greater EOF than those from octadecyldimethylchlorosilane. Restricted-access reversed-phase (RARP) packing materials having inside the pores and silanols on external surfaces higher monomeric similarly selectivity. RARP-type structure at surface seems be effective for increasing while maintaining character of solute binding sites.