This paper presents a new analytical technique for the high-precision measurement of 228Ra/226Ra ratios and Ra concentrations in seawater by multi-collector ICP mass spectrometry (MC-ICP-MS). Yu-Te Hsieh and Gideon M. Henderson from the University of Oxford, UK, demonstrate that the technique, relative to commonly used decay-counting approaches, has a lower detection limit and higher precision. This technique will allow study of 228Ra in the ocean interior where concentrations are low and will extend the powerful use of this isotope to understand mixing and trace element fluxes in the oceans.
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Precise measurement of 228Ra/226Ra ratios and Ra concentrations in seawater samples by multi-collector ICP mass spectrometry
Yu-Te Hsieh and Gideon M. Henderson
J. Anal. At. Spectrom., 2011, Advance Article
DOI: 10.1039/C1JA10013K
