Abstract
Sodium-24 was readily removed from aqueous solutions by a chromatographic process based on an isotopic exchange reaction. The reaction was carried out with a granular Kieselguhr column and a chloroform solution of crown ether-sodium picrate. The process took about 1 h and can be utilized in neutron activation analysis of many elements, Cl, Br, Sc, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Ru, In, Sn, Ce and W. It cannot be used, however, for alkali and alkaline earth elements. The amount of /sup 24/Na in a treated sample was 10/sup -2/ of the original amount. The Compton background was reduced in the range of ..gamma..-ray energy after the removal of sodium-24. 3 figures, 3 tables.
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