Separation of chlorophenols on a cation-exchanger in Ce(III) form

Summary The separation of chlorophenols on Dowex 50 WX 8 200/400 mesh resin in the H⁺ form and in the M³⁺ form has been investigated using a mixture of aqueous sulphuric acid and organic modifiers (e.g. acetonitrile or isopropanol) as the eluent. It was shown that formation of Ce³⁺ complexes with chlorophenols is a more specific interaction than physical adsorption or phase partition. Full separation of the compounds examined was achieved by elution from a column with the resin in the Ce³⁺ form.