The IRMM-2019-2029 series of uranium nitrate solutions was certified for the isotopic composition. The solutions were originally prepared for the certification of the IRMM-019-029 series of uranium hexafluoride (UF6) materials in 2014, for which certification measurements were performed by thermal ionization mass spectrometry after conversion of UF6 into uranyl nitrate solutions. Analyses were performed using the modified total evaporation method and for some materials with low 236U abundances, the n(235U)/n(238U) ratio was measured using a n(233U)/n(236U) double spike. The integrity of the certified values after dilution and ampouling of the original solutions was checked through process control measurements.
RICHTER Stephan;
VENCHIARUTTI Celia;
HENNESSY Carmel;
JAKOBSSON Ulf;
BUJAK Renata;
TRUYENS Jan;
AREGBE Yetunde;
2018-10-17
SPRINGER
JRC112287
0236-5731 (online),
https://publications.jrc.ec.europa.eu/repository/handle/JRC112287,
10.1007/s10967-018-6166-9 (online),
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