Stable Isotope Geochemistry


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[log in to unmask] (Bernhard Mayer)
Wed, 27 Nov 1996 06:31:44 +0100 (MET)
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Dear Simon:

The Analytical Quality Control Services of the IAEA in Vienna offer a
standard water IAEA 302 A with a del 2-H value of approx. +500 per mil and a
second standard water IAEA 302 B with a del 2-H value of approx. +1000 per
mil. The description of the material and a compilation of the results from
isotopic measurements of ten different laboratories along with the
recommended del 2-H values is summarized in the following report:

Intercomparison of enriched stable isotope reference materials for medical
and biological studies

by R. M. Parr and S. A. Clements

IAEA NAHRES-5, Vienna. 1991.



>Dear All,
>I am currently running enriched water samples containing enriched levels of D
>and 18O of up to +1000 ppm (relative to SMOW).  I am reliably informed by Steve
>Crowley, and others, that it is unwise to assume linearity of the mass spec
>this range making SMOW, SLAP and GISP unreliable standards.  Does any one know
>of a reliable method of creating enriched standards or a source where they
>be purchased.  Thanks.
>Dr Simon Davis
>Liverpool JMU energetics lab
>Liverpool John Moores University
>L3 3AF
Bernhard Mayer
Lehrstuhl f. Sediment u. Isotopengeologie
Institut fuer Geologie
Ruhr-Universitaet Bochum
Universitaetsstr. 150
44780 Bochum


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