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Issue 99, 2015
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Aqueous biphasic separation of 97Ru and 95,96Tc from yttrium

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Abstract

An aqueous biphasic separation technique has been developed for the separation of 97Ru, a potential candidate radionuclide in nuclear medicine, from its target matrix, yttrium. The extraction of ruthenium and technetium from bulk yttrium has been carried out with 50% (w/v) PEG-4000 and PEG-6000 against 2 M solution of various salts, such as Na-citrate, Na-tartarate, Na-malonate, Na2CO3, NaHSO3, Na2SO4, Na2S2O3, K2HPO4, K3PO4, (NH4)2SO4 and 4 M KOH, at room temperature. The influence of the pH of some salt rich phases (e.g., Na-tartarate and (NH4)2SO4) on the extraction behavior of 97Ru and 95,96Tc into the PEG rich phase was also studied. In the presence of Na-tartarate, Na-citrate, K2HPO4, K3PO4, KOH, Na2CO3, Na2SO4, Na2SO3 and (NH4)2SO4 salt solutions, 97Ru and 95,96Tc were preferentially extracted into the PEG rich phase. In 50% (w/v) PEG-4000-2 M (NH4)2SO4 ABS system, 83% of 97Ru along with 96% of 95,96Tc were extracted into the PEG rich phase without any contamination of the yttrium target. Back extraction of 97Ru into the salt rich phases from the PEG rich phase was also carried out using 2 M salt solutions of K2CO3, Na2S2O3 and 4 M KOH. About 90% back extraction of 97Ru into the salt rich phases without any contamination of 95,96Tc was obtained with 2 M Na2S2O3 salt solution. Dialysis of the PEG rich phase containing 97Ru along with 95,96Tc was also carried out against deionised water to obtain pure 97Ru.

Graphical abstract: Aqueous biphasic separation of 97Ru and 95,96Tc from yttrium

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Publication details

The article was received on 25 Jul 2015, accepted on 09 Sep 2015 and first published on 09 Sep 2015


Article type: Paper
DOI: 10.1039/C5RA14756E
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Citation: RSC Adv., 2015,5, 80919-80924

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    Aqueous biphasic separation of 97Ru and 95,96Tc from yttrium

    M. Maiti, A. Datta and S. Lahiri, RSC Adv., 2015, 5, 80919
    DOI: 10.1039/C5RA14756E

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