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Release of the new IRMM-049e 242Pu isotopic spike Certified Reference Material

3 July 2018

The Joint Research Centre Geel (JRC-Geel), Directorate G. Nuclear Safety and Security, released a new 242Pu isotopic spike certified reference material (CRM), IRMM-049e, applied for determination of plutonium content in nuclear materials by isotope dilution mass spectrometry (IDMS) in nuclear safeguards, nuclear security and in the industry. The amount content of 242Pu in IRMM-049e was characterised by Isotope Dilution – Thermal Ionisation Mass Spectrometry (ID-TIMS) and. the plutonium isotope amount ratios by TIMS. The material is certified for the amount content of 242Pu and the total Pu, the mass fractions of 242Pu and total Pu, the Pu isotope amount ratios as well as the plutonium isotope abundances as amount and mass fractions, and for the molar mass of Pu in IRMM-049e.

 This material is for use as a spike isotopic reference material for quantification of plutonium in an unknown nuclear sample. IRMM-049e is supplied in a screw-cap glass ampoule containing 10 mL nitric acid solution (c = 5 mol/L) with a certified plutonium (total Pu) mass fraction of (91.52 ± 0.12) µg/g and a certified 242Pu amount content of (0.35828 ± 0.00045) µmol/g.

As part of the IRMM-049 successful series plutonium spikes produced at the JRC.G.2-Geel, this new batch has been produced in compliance with ISO 17034:2016. These Isotopic Reference Materials are applied in nuclear fuel cycle measurements and are part of a systematic JRC programme to supply isotopic spike CRMs of various isotopes relevant for nuclear material and environmental sample analysis.

The preparation and certification of IRMM-049e is described in detail in the certification report, available together with the certificate on the detail page of our online catalogue.

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