Optimization of the double isotope dilution

Alexandre Quemet (1) , Sarah Baghdadi (1)

1 DMRC - Département de recherche sur les procédés pour la mine et le recyclage du combustible

The double isotope dilution is a powerful methodology to measure accurately the ratio between two isotopes of two different elements (e.g. 238Pu/238U, 148Nd/238U or 230Th/238U ratios). To obtain the lowest possible uncertainty, some parameters must be optimized: the elaboration of the spike and the proportion of the spike in the sample - spike mixture. A piece of code is provided to easily calculate the optimal parameters. As an example, the application of the code to 238Pu/238U and 148Nd/238U ratios determination in irradiated sample will be discussed.

Mots clés: Mass spectrometry; double isotope dilution; isotope dilution

Domaines: Chimie analytique

Alexandre Quemet, Sarah Baghdadi. Optimization of the double isotope dilution. Journal of Analytical Atomic Spectrometry, 2021, pp.10.1039/D1JA00322D. ⟨10.1039/D1JA00322D⟩. ⟨cea-03471078⟩