Abstract
A time-saving and accurate technique for determining226Ra in groundwater and soil was examined, using high-resolution inductively coupled plasma-mass spectrometry (HR-ICP-MS). The technique was applied to the determination of226Ra in groundwater and soil samples and compared with the conventional liquid scintillation counting method. This technique was capable of completing226Ra counting within 3 minutes, without the in-growth period to allow radon and its progeny to achieve secular equilibrium with the parent226Ra. The detection limits of HR-ICP-MS for226Ra in groundwater and soil were 0.19 mBq·1−1 and 0.75 Bq·kg−1, respectively, which were about 10 times lower than that of the liquid scintillation counter. The results obtained from HR-ICP-MS in groundwater and soil were in accordance with those of LSC within a relative error of about 13%.
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Kim, YJ., Kim, CK., Kim, CS. et al. Determination of226Ra in environmental samples using high-resolution inductively coupled plasma mass spectrometry. J Radioanal Nucl Chem 240, 613–618 (1999). https://doi.org/10.1007/BF02349421
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DOI: https://doi.org/10.1007/BF02349421