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Two synthetic isotope mixtures for the calibration of sulfur isotope amount ration measurements were gravimetrically prepared from high purity Ag2S materials enriched in 32S, 33S and 34S. The mixtures were made so as to closely resemble the (natural) isotopic composition of the materials to be "calibrated". The chemical preparation steps are described in detail. In the last step, the synthetic isotope mixtures were converted into SF6 for the actual sulfur isotope amount ratio measurements using the IRMM "Avogadro II amount comparator". The estimated combined uncertainties on the prepared sulfur isotope amount ratios are evaluated according to the ISO/BIPM Guide on the Expression of the Uncertainty of Measurements.

Additional information

Authors: DING T, Institute of Mineral Deposits, Beijing (CN);VALKIERS S, IRMM, JRC-Geel (BE);KIPPHARDT H, IRMM, JRC-Geel (BE);DE BIEVERE P, IRMM, JRC-Geel (BE);TAYLOR P, IRMM, JRC-Geel (BE)
Bibliographic Reference: Article: International Journal of Mass Spectrometry (1999)
Record Number: 199911388 / Last updated on: 1999-09-17
Original language: en
Available languages: en