A new era of plutonium assay and isotope ratio measurements at ultra-low levels in IAEA safeguards environmental swipe samples by isotope dilution MC-ICP-MS using a 244Pu spike

We present a new analytical method for accurately measuring femtogram amounts of Pu in environmental swipe samples using a high-purity 244 Pu spike and multi-collector inductively-coupled-plasma mass spectrometry. The method was validated by comparative measurements of samples that were previously a...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2023-07, Vol.332 (7), p.2887-2904
Main Authors: Konegger-Kappel, Stefanie, Koepf, Andreas, Katona, Robert, Kilburn, Matthew R., Boulyga, Sergei F.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Dilution
Hadrons
Heavy Ions
Inorganic Chemistry
Isotope ratios
Isotopes
Mass spectrometry
Nuclear Chemistry
Nuclear Physics
Physical Chemistry
Plutonium
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Summary:We present a new analytical method for accurately measuring femtogram amounts of Pu in environmental swipe samples using a high-purity 244 Pu spike and multi-collector inductively-coupled-plasma mass spectrometry. The method was validated by comparative measurements of samples that were previously analysed using a 242 Pu spike. The 244 Pu spike allows direct normalization of all Pu isotopes to both 244 Pu and 239 Pu, along with online monitoring of PbAr interferences, resulting in highly-sensitive and accurate Pu assay and isotope ratio measurements. Expanded uncertainties were typically 
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-023-08880-x