Dear all,
this is an important topic:
Ty Coplen has prepared a manuscript regarding rules for reporting stable isotope measurements. These rules cover the delta notation, the representation of data in charts and equations, aspects of standardization and the like. The manuscript, once accepted by the IUPAC Commission on Isotope Abundances and Atomic weights (CIAAW, http://ciaaw.org/) and by the IUPAC Interdivisional Committee on Terminology, Nomenclature and Symbols (ICTNS,http://www.iupac.org/standing/ictns.html) is intended to form the basis for future communication of isotopic results.
As an example, the manuscript recommends to abandon the factor 1000 in the delta equation, it encourages certain ways of expressing delta relations and proposes to discard others in frequent use, it labels several well-loved units (e.g. the per meg, a favorite of mine) as 'deprecated' and so on. I think this is a serious issue. Ty has made a serious attempt to come up with a concise set of recommendations to embrace the isotope world in the SI system of units.

The manuscript is available from http://www.iupac.org/reports/provisional/index.html.

Comments to the manuscript should be sent to Ty Coplen ([log in to unmask]) directly or to the secretary of CIAAW, Michael Wieser ([log in to unmask]).

Regards   Willi
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Willi A. Brand, Stable Isotope Laboratory      [log in to unmask]
Max-Planck-Institute for Biogeochemistry (Beutenberg Campus)
Hans-Knoell-Str. 10, 07745 Jena, Germany      Tel: +49-3641-576400
P.O.Box 100164,      07701 Jena, Germany      Fax: +49-3641-577400
http://www.bgc-jena.mpg.de/
http://www.bgc-jena.mpg.de/service/iso_gas_lab/
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