Journal of Radioanalytical and Nuclear Chemistry

, Volume 196, Issue 2, pp 339–344 | Cite as

Radiochemical determination of226Ra using Cerenkov counting

  • M. S. Al-Masri
  • R. Blackburn


A Cerenkov based method has been developed for the determination of226Ra via its β-emitting daughters,214Bi and214Pb. Radium isotopes are separated from interfering elements by coprecipitation on barium sulphate. The precipitate is dissolved in an alkaline solution of EDTA and the Cerenkov signal produced by the build-up of daughter β-activities is counted after 25 days using the tritium channel of a liquid scintillation counter. To correct for any contribution from the daughters of the radium isotopes224Ra and228Ra present in the sample, the barium (radium) sulphate is reprecipitated, dissolved in EDTA, and counted 2 days later. Using this procedure,228Ra and224Ra can be determined in the same sample. Cerenkov counting efficiency was found to be 77.25%. A lower limit of detection of 17.4 mBq·l−1 (based on 3σ of the background with 500-minute counting time) was achieved. Any liquid scintillation counter can be used. Chemical recoveries in the range 75%–95% were determined gravimetrically. Data from both artificial spiked samples and natural samples are presented.


EDTA Radium Barium Tritium Alkaline Solution 
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.


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  1. 1.
    J. D. LOWRY, S. B. LOWRY, J. Am. Ass. Wat. Wor., 80 (1988) 50.Google Scholar
  2. 2.
    IAEA, Environmental Behaviour of Radium, Series No. 310, Vol. 1, Vienna, 1990, p. 145.Google Scholar
  3. 3.
    H. M. PRICHARD, T. F. GESELL, 45 (1983) 991.Google Scholar
  4. 4.
    K. HORIUCHI, Y. MURAKAMI, Int. J. Appl. Radiation Isotopes, 32 (1981) 291.Google Scholar
  5. 5.
    F. SCHONHOFOR, E. HENRICH, J. Radioanal. Nucl. Chem., 115 (1987) 317.Google Scholar
  6. 6.
    F. SCHONHOFER, Analyst, 114 (1989) 1345.Google Scholar
  7. 7.
    H. HIGNCHI, M. VESUGI, K. SATOH, N. OHASHI, Anal. Chem., 56 (1984) 761.Google Scholar
  8. 8.
    M. B. COOPER, M. J. WILKS, Determination of226Ra in Environmental Samples by the Use of Liquid Scintillation Counting, ARL/TR-040 Australian Radiation Laboratory, Yailambie, Victoria, Australia, 1981, p. 15.Google Scholar
  9. 9.
    L. CHU, A. KHALIQUE, Trans. Am. Nucl. Soc., 61 (1990) 5.Google Scholar
  10. 10.
    W. C. BURNETT, W. TAI, Anal. Chem., 64 (1992) 1691.Google Scholar
  11. 11.
    R. BLACKBURN, M. S. AL-MASRI, Analyst, 117 (1992) 1949.Google Scholar
  12. 12.
    L. SALONEN, Sci. Tot. Environm., 130/131 (1993) 23.Google Scholar
  13. 13.
    A. DYER, Liquid Scintillation Counting Practice, Heyden & Son Ltd., London, 1980, p. 77.Google Scholar
  14. 14.
    R. BLACKBURN, M. S. AL-MASRI, Analyst, 118 (1993) 873.Google Scholar
  15. 15.
    A. E. GREENBERG, L. S. CLESCERI, A. D. EATON, M. A. FRANSON, Standard Methods for Examination of Water and Waste Water, 18th ed. Public Health Association, Washington, 1992, Ch. 7.20.Google Scholar
  16. 16.
    L. H. KRIEGER, E. L. WHITTAKER, Prescribed Procedures for Measurement of Radioactivity in Drinking Water, EPM-600/4-80-032, 1980, U.S. Environmental Monitoring and Support Lab, Cincinnati, OH, p. 31.Google Scholar
  17. 17.
    J. M. GODOY, Determination of Radium-228 Using Cerenkov Counting, in: Proc. Meeting on Radiological Protection and Dosimetry, L. A. MARTINS, E. C. DA SILVA AMARAL, L. TAUHATA, D. A. C. BINNS, M. B. GLORIA (Eds). Instituto de Radioprotecao e Dosimetria, Itaipava, 1983, p. 383.Google Scholar
  18. 18.
    W. L. RIGOT, K. J. REGAN, J. Radioanal. Chem., 74 (1982) 107.Google Scholar

Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • M. S. Al-Masri
    • 1
  • R. Blackburn
    • 2
  1. 1.Department of Radiation Protection and Nuclear SafetyAtomic Energy Commission of SyriaDamascusSyria
  2. 2.Department of Chemistry and Applied ChemistryUniversity of SalfordSalfordUK

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