Abstract
Direct determination of 226Ra in complex environmental matrices (biological and uranium ore samples) by collision-cell inductively coupled plasma mass-spectrometry was investigated. Possible polyatomic interferences were studied and their effects on 226Ra measurements were determined. The instrumental conditions for optimal signal-to-noise ratio for 226Ra were found. Concentrations of 226Ra in certified reference samples were measured using both external calibration and standard addition approaches. The best precision was obtained by applying standard additions. The absolute detection limit for 226Ra was 1 fg with optimal gas flow rates for the collision cell of 7 ml.min-1 for helium and 4 ml.min-1 for hydrogen.
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Epov, V.N., Lariviere, D., Evans, R.D. et al. Direct determination of 226Ra in environmental matrices using collision cell inductively coupled plasma mass-spectrometry. Journal of Radioanalytical and Nuclear Chemistry 256, 53–60 (2003). https://doi.org/10.1023/A:1023343824444
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DOI: https://doi.org/10.1023/A:1023343824444