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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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Published in: | Journal of Chromatography A 2014-05, Vol.1340, p.109-114 |
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Main Authors: | , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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. |
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ISSN: | 0021-9673 1873-3778 |
DOI: | 10.1016/j.chroma.2014.03.033 |