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Separation and determination of uranium and radium-226 in phosphorites and their industrial derivatives by extraction chromatography

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Abstract

An extraction chromatographic method based on microporous polyethylene (Microthene) supporting tri-n-octylphosphine oxide (TOPO) was used to separate uranium and226Ra from phosphorites and their industrial derivatives. Uranium was then determined by fluorimetry and by alpha-spectrometry after electroplating, and radium by precipitation as Ba(Ra)SO4 and alpha counting with a ZnS(Ag) alpha detector. The method was checked by using an IAEA phosphorite sample having a certified uranium concentration. Some phosphorite, phosphoric acid and plaster samples supplied by an Italian industrial plant were analyzed; uranium isotopes always resulted in radioactive secular equilibrium.

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Authors and Affiliations

  1. Institute of General and Inorganic Chemistry, Faculty of Pharmacy, University of Urbino, (Italy)

    C. Testa, D. Desideri & M. A. Meli

  2. ENEA, CRE Casaccia, Rome, (Italy)

    S. Bazzarri

Authors
  1. C. Testa
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  2. D. Desideri
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  3. M. A. Meli
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  4. S. Bazzarri
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Testa, C., Desideri, D., Meli, M.A. et al. Separation and determination of uranium and radium-226 in phosphorites and their industrial derivatives by extraction chromatography. Journal of Radioanalytical and Nuclear Chemistry, Articles 129, 191–200 (1989). https://doi.org/10.1007/BF02037582

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  • DOI: https://doi.org/10.1007/BF02037582

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