Chromatographic separation of cerium(III) in L-valine medium using poly[dibenzo-18-crown-6].

A column chromatographic method has been developed for the separation and determination of cerium(III) using poly[ dibenzo-18-crown-6]. The separation was carried out in L-valine medium. The adsorption of cerium(III) was quantitative from 1 x 10(-1) to 1 x 10(-4) mol/L L-valine.