FIELD: chemistry.
SUBSTANCE: method of extracting an 225Ac preparation from a mixture of 228Th and 229Th includes the sorption of the mixture of thorium isotopes on a strongly basic ion-exchange resin, followed by the purification of the solution containing 225Ac, and separating radioactive radium and lead isotopes via precipitation thereof. Further, the solution containing 225Ac is purified using D2EHPA-based sorbents.
EFFECT: low radiolysis rate of ion-exchange resins.
4 cl, 3 dwg
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