PROBLEM TO BE SOLVED: To provide a method for refining 99mTc for reducing the residual amounts of a solvent to be used in a refining process, and for improving a yield.SOLUTION: A refining method of 99mTc includes: a dissolution process of dissolving and pH-adjusting99Mo/99mTc target 10 to obtain an alkaline solution an anion-exchange column absorption process of introducing the solution to an anion-exchange column 13 to absorb99Mo and99mTc a 99Mo removal process of removing the absorbed 99Mo with the solution a 99mTc extraction process of extracting the absorbed 99mTc with the solution a 99mTc solution preparation process of drying and solidifying extract, and adding water to obtain a 99mTc solution an acid alumina column absorption process of introducing the solution containing 99mTc to an acid alumina column 15 to make the acid alumina column 15 absorb 99mTc and a99mTc recovery process of extracting and recovering 99mTc absorbed by the acid alumina column 15 with a saline solution.COPYRIGHT: (C)2014,JPO&INPIT【課題】精製過程で使用する溶媒の残留量を低減すると共に収率の向上を図ることができる99mTcの精製方法を提供する。【解決手段】99mTcの精製方法は、99Mo/99mTcターゲット10を溶解しpH調整を行って、アルカリ性の溶解液を得る溶解工程と、溶解液を陰イオン交換カラム13に導入し99Moと99mTcとを吸着させる陰イオン交換カラム吸着工程と、吸着された99Moを溶媒で除去する99Mo除去工程と、吸着された99mTcを溶媒で抽出する99mTc抽出工程と、抽出液を乾固させ水を加えて99mTc水溶液を得る99mTc溶液調製工程と、99mTcを含む溶液を酸性アルミナカラム15に導入し酸性アルミナカラム15に99mTcを吸着させる酸性アルミナカラム吸着工程と、酸性アルミナカラム15に吸着された99mTcを食塩水で抽出し回収する99mTc回収工程と、を備える。【選択図】図1
