Hyphenation of capillary electrophoresis with MC-ICP-MS - A novel tool for uranium age dating

TALANTA

卷:219

Article

Dupuis, Erwan¹  Isnard, Helene¹  Evette, Charles¹  Chartier, Frederic² 

[1] Univ Paris Saclay, DEN, Serv Etud Analyt & React Surfaces SEARS, CEA, F-91191 Gif Sur Yvette, France

[2] Univ Paris Saclay, DEN, Dept Phys Chim DPC, CEA, F-91191 Gif Sur Yvette, France

关键词: Capillary electrophoresis;    Multi-collector ICP-MS;    Stacking;    Nuclear forensics;    Isotope dilution;    Uranium thorium;   

DOI  :  10.1016/j.talanta.2020.121345

来源: Elsevier

【 摘 要 】

Capillary electrophoresis (CE) was hyphenated to multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) to determine the model age of a highly enriched uranium (HEU) sample using the U-234/Th-230 radiochronometer. The use of hydroxymethylbutyric acid (HMBA) as the CE electrolyte was investigated, and a complexation stacking method was developed to increase the thorium signal obtained. The age of the material was determined by measuring the Th-230 content of the HEU sample using isotope dilution in conjunction with the CE-MC-ICP-MS protocol. The CE-MC-ICP-MS protocol and a standard offline protocol using gravitational chromatography both gave results in accordance within uncertainties with the production date of the HEU sample (March 1965). Liquid waste production was only of a few microliters with the use of CE. The hyphenation of CE with MC-ICP-MS render the measurement of the age of the HEU material in less than one day possible. Obtaining results in a timely fashion is of particular importance for nuclear forensics studies.

【 授权许可】

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