Distribution coefficients and cation-exchange selectives of elements with AG50W-X8 resins in perchloric acid.
Cation-exchange distribution coefficients with AG50W-X8, a sulphonated polystyrene resin, aie presented for 44 cations in perchloric acid solutions of concentrations varying from 0.1 to 4.0M. The cations are arbitrarily arranged in a table according to their distribution coefficients in 1.OM perchloric acid. Some possible separations are discussed and elution curves are presented for the separation of the ion pairs Zn-Pb, Tl(I)-Bi, Mg-Al and Co(II)-Fe(III). Selectivity sequences for uni-, bi-, ter- and quadrivalent cations are given in which the cations are ordered on the basis of the average numerical value of their distribution coefficients over the straight part of the curve obtained by plotting the logarithm of the distribution coefficient against the logarithm of [H(+)].
Strelow
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National Chemical Research Laboratory, P.O. Box 395, Pretoria, S. Africa.
Sondorp
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