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Lloyd et al 2009 - Precise and accurate isotopic analysis of microscopic uranium-oxide grains using LA-MC-ICP-MS - PREPRINT.pdf (277.62 kB)

Precise and accurate isotopic analysis of microscopic uranium-oxide grains using LA-MC-ICP-MS

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posted on 2010-01-04, 15:31 authored by Nicholas Selwyn Lloyd, Randall R. Parrish, Matthew S.A. Horstwood, Simon R.N. Chenery
Uranium isotope (235U, 236U, 238U) ratios were determined for microscopic uranium-oxide grains using laser-ablation multi-collector inductively-coupled-plasma mass-spectrometry (LA-MC-ICP-MS). The grains were retrieved from contaminated soil and dust samples. The analytical technique utilised is rapid, requires minimal sample preparation, and is well suited for nuclear forensic applications. Precision and accuracy were assessed by replicate analyses of natural uraninite grains: relative uncertainty for 235U/238U is 0.2% (2), and the mean is in agreement with the natural ratio. A total of 115 uranium-oxide grains were analysed from environmental samples (soils and dusts); all of these were depleted uranium (DU) from a factory that produced uranium articles. Knowledge of the range of isotope ratios from particles of this controversial contaminant has proven useful when interpreting isotope ratios from bulk samples. Variation of the measured isotope signatures reveals details of the history of uranium processing and emissions.

History

Citation

Journal of Analytical Atomic Spectrometry, 2009, 24 (6), pp. 752-758.

Published in

Journal of Analytical Atomic Spectrometry

Publisher

Royal Society of Chemistry

issn

0267-9477

Available date

2010-01-04

Publisher version

http://dx.doi.org/10.1039/b819373h

Notes

This is the author's final draft of the paper published as Journal of Analytical Atomic Spectrometry, 2009, 24 (6), pp. 752-758. The final version is available from http://www.rsc.org/publishing/journals/JA/article.asp?doi=b819373h. Doi: 10.1039/b819373h

Language

en

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