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  • A primary isotopic gas standard for sulfur in the form of SF6 with Systeme International d'Unites traceable values for isotopic composition and molar mass


A batch of SF6 gas prepared by Messer was metrologically certified for absolute isotope abundance ratios and molar mass of sulfur following the ISO/BIPM guide to the expression of uncertainties in measurements. The certification is based on on the "Avogadro II Measurement Procedure" using the "Avogadro II amount comparator", which was developed in the framework of the redetermination of the Avogadro constant.

Additional information

Authors: IRMM, University of Gent, Gent (BE);JRC-Geel (BE), University of Gent, Gent (BE)
Bibliographic Reference: Article: International Journal of Mass Spectrometry, 193(1999)1-8
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