Cation exchange distribution coefficients with Bio-Rad AG 50W-X8, a sulfonated polystyrene cross-linked with divinyl benzene are presented for 54 cations in hydrochloric acid-acetone media, covering the acid concentration range 0.1 to 3.OM and the acetone concentration range 0 to 95%. The elements are arbitrarily arranged in tables according to their coefficients in aqueous hydrochloric acid. A number of the possibilities of this system for separations are pointed out and some aspects of the elution behavior of various elements are discussed. The versatility of hydrochloric acidacetone mixtures as eluting agent for cation exchange separations is demonstrated by sequential elution of the mixtures TI(III), In, Ga, AI, Yb; Cd, Zn, Fe(lll), Cu(ll), Co(ll), Mn(ll); and V(V), Fe(lll), U(VI), Ti(IV), Ca, Ba.
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