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Czechoslovak Journal of Physics

, Volume 53, Supplement 1, pp A181–A188 | Cite as

Simultaneous determination of radioactive halogen isotopes and 99Tc

  • E. Kabai
  • N. Vajda
  • P. Gaca
Session 2: Nuclear Analytical Methods

Abstract

The purpose of this study was to develop a simplified method for simultaneous determination of radiologically important halogen isotopes and 99Tc from different types of samples like environmental, biological and waste samples. Due to their long half-lives (longer than 105 years) they play important role in the nuclear cycle, especially in environmental monitoring and protection.

For a rapid response in the evaluation of 129I, 36Cl and 99Tc contamination levels of these samples it is advantageous to combine the existing individual methods. According to the present procedure, iodine, chlorine and technetium are separated selectively from the same sample aliquot followed by the ß-spectrometry of the purified fractions. Increased sensitivities can be achieved by neutron activation (NA) especially in the case of 129I.

Our work intends to solve the problem by combining the well-known hot acidic distillation method for iodine separation with the organic extraction process characteristic for technetium separation. The major objective of the work was to separate the disturbing halides from iodine. For this purpose a selective oxidant was applied.

For the sample destruction and fractionated distillation an air flow-through installation was used with hot concentrated sulphuric and nitric acids. The trap for iodine contained 3 M NaOH solution. After iodine separation the trap was exchanged for a new one containing the same solution for trapping chlorine or bromine with an addition of 0.01 M KMnO4 solution as an oxidative agent. As expected, the main part of technetium was contained in the acidic residue after distillation. Tc purification was performed by organic extraction with TBP and TEVA column.

Keywords

Inductively Couple Plasma Mass Spectrometry Technetium Chemical Yield Evaporation Residue Chemical Recovery 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. [1]
    Garcia-Leon M.: J. Radioanal. Nucl. Chem. 138 (1990) 171.CrossRefGoogle Scholar
  2. [2]
    Tagami K. and Uchida S.: Int. J. Applied Radiation and Isotopes 47 1057.Google Scholar
  3. [3]
    Harvey B. R., Ibbett R. D., Williams K. J. and Lovett M. B.: MAFF, ISSN 0953-4466.Google Scholar
  4. [4]
    Muramatsu Y., Ohmomo Y. and Christoffers D.: J. Radioanal. Nucl. Chem. 82 (1984) 353.CrossRefGoogle Scholar
  5. [5]
    Madoc and Hagan (BNFL): Eichrom Users’ Group Meeting, Paris (1999).Google Scholar
  6. [6]
    Keller B. J., McKibbin T. T., Erikson A. L. and Filby C. W.: J. Radionanal. Nucl. Chem. 158 (1992) 75.CrossRefGoogle Scholar
  7. [7]
    Hertelendi E: Project report (1995) ATOMKI, Debrecen, Hungary.Google Scholar
  8. [8]
    Hertelendi E.:Project report (1996) ATOMKI, Debrecen, Hungary.Google Scholar
  9. [9]
    Aakrog A. et al.: Elsevier Applied Science Publishers 1986.Google Scholar
  10. [10]
    Holm E. et al.: Technetium-99 in algae temperate and arctic waters of the North Atlantic, Elsevier Applied Science Publishers, 1986.Google Scholar
  11. [11]
    Bohn B., Luxemburger J. and Schüttelkopf H.: Radiochemical Determination of Tc-99 and release of Tc-99 from nuclear facilities, Elsevier Applied Science Publishers, 1986.Google Scholar
  12. [12]
    Bate T. H.: Environm. Int. 14 (1993) 283.CrossRefGoogle Scholar
  13. [13]
    Tseng C. and Chao J.: Appl. Radiat. Isot. 47 (1996) 723.CrossRefGoogle Scholar
  14. [14]
    Kok J de, et al.: Nucl. Med. Biol. 17 (1990) 303.Google Scholar
  15. [15]
    IAEA Report CU-94-01.Google Scholar
  16. [16]
    Quintana E. E. and Thyssen S. M.: J. Radioanal. Nucl. Chem. 245 (2000) 545.CrossRefGoogle Scholar
  17. [17]
    Keller B. J. et al.: J. Radioanal. Nucl. Chem. 158 (1992) 75.CrossRefGoogle Scholar
  18. [18]
    Hertelendi E. et al.: Project report, 1995, ATOMKI, Debrecen, Hungary.Google Scholar
  19. [19]
    Hertelendi E. et al.: Project report, 1995, ATOMKI, Debrecen, Hungary.Google Scholar
  20. [20]
    Ashton L., Warwick P. and Giddings D.: The Analyst 124 (1999) 627.CrossRefGoogle Scholar
  21. [21]
    Zs: Szanto et al.: in Proc. International Conference, Nuclear Energy in Central Europe, Portoroz, Slovenia, 2001.Google Scholar

Copyright information

© Institute of Physics, Acad. Sci. CR 2003

Authors and Affiliations

  • E. Kabai
    • 1
  • N. Vajda
    • 2
  • P. Gaca
    • 2
  1. 1.Budapest University of Technology and EconomicsInstitute of Nuclear TechniquesHungary
  2. 2.Henryk Niewodniczański Institute of Nuclear PhysicsCracowPoland

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