The JRC-IRMM is currently replacing some of its exhausted stocks of certified reference materials with new ones whose specifications are up-to-date and tailored for the demands of modern analytical techniques.
A new mixed spike Isotopic Reference Material of highly enriched uranium‑233 and plutonium-242 has been prepared and certified for plutonium isotope amount content and isotopic composition. It is applied for Isotope Dilution Mass Spectrometry (IDMS) in nuclear fuel cycle measurements.
The IRMM-046c is supplied in a glass ampoule with screw cap seals containing about 10 mL of plutonium and uranium in 5 mol•L-1 nitric acid. Each unit contains about 10 mg uranium with a relative mass fraction m(233U)/m(U) of 99.8 % and about 1 mg plutonium with a relative mass fraction m(242Pu)/m(Pu) of 94.7 %. The certified values were established by Isotope Dilution Thermal Ionisation Mass Spectrometry (ID-TIMS) and Thermal Ionisation Mass Spectrometry (TIMS).
IRMM-046c was certified in the scope of the on-going inter-calibration campaign inter-linking selected JRC-IRMM plutonium spikes on a metrological basis applying state-of-the art measurement procedures.
Read more in:
R. Jakopič et al., An inter-calibration campaign using various selected Pu spike isotopic reference materials, Journal of Radioanalytical and Nuclear Chemistry. November 2010, Volume 286, Issue 2, pp449-454