Chromatographic Separation of Rare Earth Pairs by a Chelating Resin Having Bis(carboxymethyl)amino Groups
- 1 November 1989
- journal article
- research article
- Published by Oxford University Press (OUP) in Bulletin of the Chemical Society of Japan
- Vol. 62 (11) , 3451-3456
- https://doi.org/10.1246/bcsj.62.3451
Abstract
Adsorption properties of rare earth elements toward a cross-linked polystyrene resin having bis(carboxymethyl)amino groups (CMA) have been studied. The selectivity sequence of the resin for a series of rare earth metals was in good accordance with that of the corresponding stability constants of diethylenetriamine-N,N,N′,N″,N″-pentaacetic acid (DTPA) complexes. The chromatographic separation of La(III)/Pr(III), Nd(III)/Sm(III), and Y(III)/Gd(III) has been carried out by use of the present resin. The chromatographic conditions were empirically evaluated in terms of resolution (Rs), with varying column length, pH of the eluent, the flow rate and the column temperature.Keywords
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