In this study, data from thirteen laboratories from around the world are presented for a successful certification of uranium isotope ratios in uranium ore concentrate certified reference materials from the National Research Council Canada. Different mass spectrometric techniques (including SF-ICPMS, q-ICM-MS, TIMS, MC-ICP-MS, SIMS, and AMS) and analytical methods were employed. In general, the reported data from all sources exhibit good consistency, and as expected TIMS and MC-ICP-MS showed superior performances.
The three candidate uranium ore concentrate CRMs, UCLO-1, UCHI-1, and UPER-1, have natural uranium isotope ratios with certified values of 0.5304(7)×10–4, 0.5475(2)×10–4, and 0.5361(4)×10–4 for n(234U)/n(238U) and 0.007 2563(13), 0.007 2563(10), and 0.007 2542(11) for n(235U)/n(238U), respectively, with expanded uncertainty (k=2) applicable to the last digit of the value given in the parentheses. Information values for n(236U)/n(238U) in these three CRMs, measured by AMS, are also provided: 10×10–12, 2×10–12, and 22×10–12. The uncertainties of the proposed certified values of uranium isotope ratios in uranium ore concentrate CRMs are superior to available reference materials and the values of n(234U)/n(238U) and n(236U)/n(238U) show significant variation among the three CRMs.
ZHANG Rouxi;
NADEAU Kenny;
GAUTIER Eduardo Amilcar;
BABAY Paola Alejandra;
RAMELLA José Luis;
VIRGOLICI M.;
SERBAN Andreea Elena;
FUGARU Viorel;
KIMURA Yoshiki;
VENCHIARUTTI Celia;
RICHTER Stephan;
AREGBE Yetunde;
VARGA Zsolt;
WALLENIUS Maria;
MAYER Klaus;
SEO Hana;
CHOI Jung Youn;
TOBI Csaba;
FAYEK Mostafa;
SHARPE Ryan;
SAMPERTON Kyle M.;
GENETTI Victoria;
LINDVALL R.;
INGLIS J.D.;
DENTON Joanna;
REINHARD Andrew A.;
FRANCISCO Barbara;
ZHAO Xiaolei;
KIESER Liam;
HE Juan;
GAO Ying;
MEIJA Juris;
EL-JABI Ali;
YANG Lu;
MESTER Zoltan;
2022-03-21
WILEY
JRC125397
1639-4488 (online),
https://onlinelibrary.wiley.com/doi/10.1111/ggr.12409,
https://publications.jrc.ec.europa.eu/repository/handle/JRC125397,
10.1111/ggr.12409 (online),
