Astatine solution and method for producing same
AssigneeOsaka University
InventorsYoshifumi Shirakami, Tadashi Watabe, Kazuko Kaneda, Eku Shimosegawa, Atsushi Shinohara, Jun Hatazawa
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Abstract
The invention provides a method for producing a solution containing 211At− (astatide ion) at a high radiochemical purity by using 211At obtained by a nuclear reaction as a starting material, including a step of adding a reducing agent to a solution containing an impurity derived from 211At. The invention also provides a solution containing 211At− (astatide ion) at a radiochemical purity of not less than 30%.
Claims12
A method for producing an aqueous solution, an ethanol solution, or an aqueous ethanol solution, comprising 211At− at a radiochemical purity of not less than 90% by using 211At obtained by a nuclear reaction as a starting material, the method comprising a step of adding a reducing agent selected from the group consisting of ascorbic acid and a salt of ascorbic acid to an aqueous solution, an ethanol solution, or an aqueous ethanol solution comprising an impurity derived from 211At, wherein the reducing agent is added at a final concentration of 0.5 wt % or higher with respect to the aqueous solution, ethanol solution, or aqueous ethanol solution comprising an impurity derived from 211At.
Dependencies are inferred from the claim text.