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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
Article

Abstract

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.

Keywords

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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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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