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

DOI to cite this document:: 10.5283/epub.19988

Kandlbinder, Robert ; Schupfner, Robert ; Wolfbeis, Otto S.

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Date of publication of this fulltext: 18 Mar 2011 06:57

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Abstract

The determination of Ra-228 by means of gamma-spectrometry, in material containing significant quantities of K-40 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 K-40. However, K-40 is widely removed from bone ash if Ra-228 is coprecipitated with barium sulfate. As ...