Journal of Radioanalytical and Nuclear Chemistry

, Volume 92, Issue 1, pp 151–158 | Cite as

Uranium and thorium determination in Brazilian coals by epithermal neutron activation analysis

  • L. F. Bellido
  • B. de C. Arezzo
Physical Methods Section


An experimental technique has been developed to determine impurities in coal. Uranium was determined by counting the239Np 106.1 keV γ-ray with a LEPS detector and thorium by counting the233Pa 311.8 keV γ-ray with a Ge(Li) detector. Seventeen coal samples were analyzed with an average precision of 3% and a quantitative determination limit of 0.153 μg/g for uranium and 0.078 μg/g for thorium. The technique allows determinations of up to twenty elements besides U and Th and can be applied in routine analysis.


Inorganic Chemistry Uranium Experimental Technique Activation Analysis Thorium 
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Copyright information

© Akadémiai Kiadó 1985

Authors and Affiliations

  • L. F. Bellido
    • 1
  • B. de C. Arezzo
    • 1
  1. 1.Instituto de Engenharia NuclearComissão Nacional de Energia NuclearRio de Janeiro(Brasil)

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