Isotopic compositions of the elements 2009 (IUPAC Technical Report)

Berglund, Michael; Wieser, Michael E.

doi:10.1351/PAC-REP-10-06-02

Pure Appl. Chem., 2011, Vol. 83, No. 2, pp. 397-410

http://dx.doi.org/10.1351/PAC-REP-10-06-02

Published online 2011-01-14

Isotopic compositions of the elements 2009 (IUPAC Technical Report)

Michael Berglund¹* and Michael E. Wieser²

¹ European Commission, Joint Research Centre, Institute for Reference Materials and Measurements (IRMM), Belgium
² Department of Physics and Astronomy, University of Calgary, Canada

Abstract: The Commission on Isotopic Abundances and Atomic Weights (CIAAW) of the International Union of Pure and Applied Chemistry (IUPAC) completed its last update of the isotopic compositions of the elements as determined by isotope-ratio mass spectrometry in 2009. That update involved a critical evaluation of the published literature and forms the basis of the table of the isotopic compositions of the elements (TICE) presented here. For each element, TICE includes evaluated data from the “best measurement” of the isotope abundances in a single sample, along with a set of representative isotope abundances and uncertainties that accommodate known variations in normal terrestrial materials. The representative isotope abundances and uncertainties generally are consistent with the standard atomic weight of the element A_r(E) and its uncertainty U[A_r(E)] recommended by CIAAW in 2007.