Abstract
Four kinds of silica—containing mixed oxide gels (silica—zirconia, silica—alumina, silica—titania and silica—magnesia) were prepared by a coprecipitation method and studied as column packing materials for liquid chromatography. The physico-chemical characteristics of the gels such as the BET surface area and the acidity of the solid surface were determined. Further, the separation properties of these gels for benzene, dimethyl phthalate and pyridine were evaluated. It was found that silica—magnesia had the best separation ability for the basic compound pyridine, presumably owing to the decrease in the activity of the silanol group and the existence of only very weak acid sites on the surface.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
