Los Alamos National Security, LLC

Beau D Ballard

Michael E Fassbender

The preparation of aSe/As radioisotope generator involves forming an acidic aqueous solution of an irradiated alkali bromide target such as a NaBr target, oxidizing soluble bromide in the solution to elemental bromine, removing the elemental bromine, evaporating the resulting solution to a residue, removing hydrogen chloride from the residue, forming an acidic aqueous solution of the residue, adding a chelator that selectively forms a chelation complex with selenium, and extracting the chelation complex from the acidic aqueous solution into an organic phase. As theSe generatesAs in the organic phase, theAs may be extracted repeatedly from the organic phase with an aqueous acid solution.

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Los Alamos, NM, United States of America

Beau D Ballard