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Determination of Rn-222 in freshwater: development of a robust method of analysis by alpha/beta separation liquid scintillation spectrometry.

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<mark>Journal publication date</mark>23/08/2006
<mark>Journal</mark>Applied Radiation and Isotopes
Issue number1
Number of pages12
Pages (from-to)92-103
<mark>Original language</mark>English


Liquid scintillation spectrometry is used widely for determining 222Rn in natural waters; however, the benefits of α/β separation have not been fully explored. The extractants toluene and Ultima Gold F were compared, and both performed well for a range of extreme waters. A robust method for calibrating extraction and counting efficiencies has been developed. Detection limits are 20 mBq l−1 (toluene) and 16 mBq l−1 (UGF) for a 60 min count and 600-ml sample, halving the required sample volume.

Bibliographic note

The final, definitive version of this article has been published in the Journal, Applied Radiation and Isotopes, 65 (1), 2007, © ELSEVIER.