FIELD: purification of actinium.
SUBSTANCE: invention is related in particular to purification of Ac from a mixture containing Ac and at least one element selected from Ra, Pb, Po, Bi and La. The Ac purification method includes performing a first separation using a first extraction chromatography column based on a first resin and performing a second separation using a second extraction chromatography column based on a second resin. The first resin is a diglycolamide resin or a dialkyl phosphoric acid resin, the second resin is a dialkyl phosphoric acid resin or a diglycolamide resin, respectively. The first and second matrix solutions, the first and second wash solutions, and the first and second eluents contain HNO3 and/or HCl. Moreover, the first eluate is immediately loaded onto the second extraction chromatographic column by forming a tandem between the first and second extraction chromatographic columns.
EFFECT: increases the speed and productivity of the Ac cleaning process.
15 cl, 5 dwg, 4 ex
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