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Determination of 228Ra in human bone ash containing significant quantities of 40K and Ca2+

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Abstract

The determination of 228Ra by means of γ-spectrometry, in material containing significant quantities of 40K and Ca2+ such as bone ash results in increased values of counting uncertainty and lower limit of detection (LLD) because of a significant contribution from the Compton continuum of 40K. However, 40K is widely removed from bone ash if 228Ra is coprecipitated with barium sulfate. As a result, the counting uncertainty and LLD are significantly reduced. A method is presented for determination of very low activity concentrations of 228Ra. Impurities introduced by precipitation are negligible when applying high resolution γ-spectrometry.

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Authors and Affiliations

  1. Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, 93040, Regensburg, Germany

    Robert Kandlbinder, Robert Schupfner & Otto S. Wolfbeis

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  1. Robert Kandlbinder
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  2. Robert Schupfner
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  3. Otto S. Wolfbeis
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Correspondence to Robert Schupfner.

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Kandlbinder, R., Schupfner, R. & Wolfbeis, O.S. Determination of 228Ra in human bone ash containing significant quantities of 40K and Ca2+ . J Radioanal Nucl Chem 283, 69–73 (2010). https://doi.org/10.1007/s10967-009-0061-3

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  • DOI: https://doi.org/10.1007/s10967-009-0061-3

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