Method for purifying 226Ra-containing solution, method for producing 226Ra target, and method for producing 225Ac

Abstract

An object of the present invention is to provide a method for purifying efficiently and easily a 226Ra-containing solution obtained when 225Ac is produced from a 226Ra target, a method for producing a 226Ra target by using the purified 226Ra-containing solution obtained by the above purification method, and a method for producing 225Ac including these above methods. The method for purifying a 226Ra-containing solution according to the present invention is characterized by including an adsorption step (R1) of allowing 226Ra ions to adsorb onto a carrier having a function of selectively adsorbing divalent cations by bringing a 226Ra-containing solution (a) into contact with the carrier under an alkaline condition; and an elution step (R2) of eluting the 226Ra ions from the carrier under an acidic condition.

Dependencies are inferred from the claim text.