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Chromatographic separation of selenium and arsenic: A potential 72Se/72As generator

•Ion exchange separation for 72Se and 72As developed.•Oxidation method to Se(VI) for column loading developed.•H3AsO4 eluted at pH 1.5 while SeO42−/HSeO4− retained.•Kd values reported for As(V), Se(IV) and Se(VI).•Resin gamma irradiation has minimal effects on Se breakthrough. An anion exchange meth...

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Bibliographic Details
Published in:Journal of Chromatography A 2014-05, Vol.1340, p.109-114
Main Authors: Wycoff, Donald E., Gott, Matthew D., DeGraffenreid, Anthony J., Morrow, Ryan P., Sisay, Nebiat, Embree, Mary F., Ballard, Beau, Fassbender, Michael E., Cutler, Cathy S., Ketring, Alan R., Jurisson, Silvia S.
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Language:English
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Summary:•Ion exchange separation for 72Se and 72As developed.•Oxidation method to Se(VI) for column loading developed.•H3AsO4 eluted at pH 1.5 while SeO42−/HSeO4− retained.•Kd values reported for As(V), Se(IV) and Se(VI).•Resin gamma irradiation has minimal effects on Se breakthrough. An anion exchange method was developed to separate selenium and arsenic for potential utility in a 72Se/72As generator. The separation of the daughter 72As from the 72Se parent is based on the relative acid–base behavior of the two oxo-anions in their highest oxidation states. At pH 1.5, selenate is retained on strongly basic anion exchange resin as HSeO4− and SeO42−, while neutral arsenic acid, H3AsO4, is eluted.
ISSN:0021-9673
1873-3778
DOI:10.1016/j.chroma.2014.03.033