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    Germanium Isotope Materials

    In naturally occurring terrestrial materials, the δ74/70Ge values cover an interval between −5 and +5 ‰ relative to NIST SRM 3120a.


    δ74/70Ge Values of Reference Materials

    Name Material δ74/70GeSRM3120a
    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 δ74/70GeSRM3120a

    Footnotes      Back to Top
    * Exact value defining the δ74/70GeSRM3120a 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)