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Determination of90Sr in environmental and biological materials with combined HDEHP solvent extraction-low liquid scintillation counting technique

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Abstract

Low level90Sr in environmental and biological samples is determined using a combined HDEHP solvent extraction-liquid scintillation procedure. Yttrium-90 is selectively extracted from nitric acid solution into 5% di(2-ethylhexyl) phosphoric acid (HDEHP) in toluene, and90Y in the organic phase is measured directly using an ultra low level liquid scintillation spectrometer.

The working program of the Quantulus counter has been optimized. As the counting efficiency using liquid scintillation counting is high and the stripping and precipitation of Yttrium-90 oxalate is omitted, this procedure is simpler and more timesaving than traditional methods. The chemical recoveries of90Y were 85.1% for soil, 75.7% for milk and 65.3% for bone. The detection limit is 8 mBq.

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Author notes

  1. Yu-Fu Yu

    Present address: Fudan University, Shanghai, P.R. China

Authors and Affiliations

  1. Isotope and Electron Microscopy Laboratories, Agricultural University of Norway, P. O. Box 26, N-1432, Aas-NLH, (Norway)

    H. E. Bjørnstad, H. N. Lien, Yu-Fu Yu & B. Salbu

Authors
  1. H. E. Bjørnstad
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  2. H. N. Lien
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  3. Yu-Fu Yu
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  4. B. Salbu
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Bjørnstad, H.E., Lien, H.N., Yu, YF. et al. Determination of90Sr in environmental and biological materials with combined HDEHP solvent extraction-low liquid scintillation counting technique. Journal of Radioanalytical and Nuclear Chemistry, Articles 156, 165–173 (1992). https://doi.org/10.1007/BF02037431

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  • DOI: https://doi.org/10.1007/BF02037431

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