Abstract: A method for separating a mixture of at least two chemical compounds which first involves loading and sintering a frit material in a capillary to form a first retaining frit. After removing substantially all unsintered frit material from the capillary, a packing material made up of a substrate coated with a linear carbohydrate polymer is loaded into the capillary adjacent to the first retaining frit to form a stationary phase. More frit material is loaded in the capillary and is sintered to form a second retaining frit adjacent to the packing material on the side opposite from the first retaining frit. Substantially all unsintered frit material is again removed from the capillary. The chemical mixture is then introduced into the capillary at one of the retaining frits, and migration of the mixture across the packing material is induced by applying a voltage across the capillary. Differences in electroosmotic flow velocity between the compounds cause them to separate during migration.