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    Germanium Isotope Materials

    In naturally occurring terrestrial materials, the δ(74/70Ge) values cover an interval between −5 and +5 ‰ relative to NIST SRM 3120a.


    δ(74/70Ge) Values of Reference Materials

    Name Material δSRM3120a(74/70Ge)
    NIST SRM 3120aelemental Ge 0 ‰*
    BHVO-1basalt+0.55(15) ‰
    BHVO-2basalt+0.51(10) ‰
    n/aseawater+2.5 ‰ **
    n/abulk silicate Earth+0.59(18) ‰ **
    Ge-Spexsolution-0.70(7) ‰
    CLB-1USGS coal+1.24(10) ‰
    Name Material δSRM3120a(74/70Ge)

    Footnotes      Back to Top
    * Exact value defining the δ(74/70Ge) SRM3120a scale.
    ** See the Assessment of international reference materials for isotope-ratio analysis for more details.
    Values in parenthesis are expanded (k = 2) uncertainties applicable to the last digits. The values listed in this table are compilation and are not necessarily CIAAW recommendations.

    Citation

    W.A. Brand et al
    Assessment of international reference materials for isotope-ratio analysis Pure and Applied Chemistry 86, 425-467 (2014)