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Acta Chimica Slovaca

The Journal of Slovak University of Technology in Bratislava

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1337-978X
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Sequential determination of 99Tc and 126Sn in radioactive concentrate

Veronika Silliková
  • Corresponding author
  • Comenius University, Faculty of Natural Sciences, Department of Nuclear Chemistry, Ilkovičova 6, Mlynská dolina, 842 15 Bratislava, Slovakia
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  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Silvia Dulanská
  • Comenius University, Faculty of Natural Sciences, Department of Nuclear Chemistry, Ilkovičova 6, Mlynská dolina, 842 15 Bratislava, Slovakia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-06-23 | DOI: https://doi.org/10.1515/acs-2017-0010

Abstract

This paper describes a new sequential method using anion exchange resin, which is commercially available from Eichrom Technologies, Inc., for the determination of 99Tc and 126Sn in nuclear waste samples. For the determination of non-actinide radionuclides in radioactive wastes, several methods have been recently introduced. This method is suitable for the separation of radionuclides 99Tc and 126Sn from acidic solutions. Samples after digestion were directly loaded in 2 mol·dm-3 HCl acid on a cation exchange resin and then on an anion exchange. They were eluted with HNO3. After elution, the eluted fractions were measured either by gamma spectrometry on an HPGe detector or liquid scintillation counter with high chemical recoveries for a short period of time. Activity concentrations of 126Sn were below minimum detectable activity (MDA) for each experiment. A new radioanalytical method for the sequential determination of 99Tc and 126Sn in radioactive concentrates has been developed and successfully applied. The main advantage of the method was the time required for the separation of radionuclides, which was only five hours, and single column separation for the determination of these radionuclides, which makes the method very effective and cheap.

Keywords: anion exchange; radioactive concentrate; sequential determination; Sn-126 separation; Tc-99 separation

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About the article

Published Online: 2017-06-23

Published in Print: 2017-04-25


Citation Information: Acta Chimica Slovaca, Volume 10, Issue 1, Pages 61–64, ISSN (Online) 1337-978X, DOI: https://doi.org/10.1515/acs-2017-0010.

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© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava . This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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