Roland
Details can be found in the following paper,

Farquhar, G.D., Henry, B.K. and Styles, J.M. (1997). A rapid on-line
technique for determination of oxygen isotope composition of
nitrogen-containing organic matter and water. Rapid Communications in Mass
Spectrometry 11:1554-1560

I think they have been improving the system since the paper was published.
Contact Graham Farquhar for further details.
Environmental Biology Group
Research School of Biological Sciences
Institute of Advanced Studies
Australian National University
GPO Box 475 Canberra ACT 2601
Australia

Cheers, David



On Mon, 14 Jun 1999 10:36:38 Roland Werner wrote:
>Hi everyone,
>
>Is there anyone out there who measured d18O values of organic substances
>
>other than cellulose?? Are there any data available, or does anyone know
>of
>recent (or older) papers on that subject?
>Thanks
>
>Roland
>
>***************************************************************************
*****
>
>Dr. Roland A. Werner
>Max-Planck-Institut fuer Biogeochemie
>Tatzendpromenade 1a, 07745 Jena, Germany
>Postanschrift:
>Postfach 10 01 64, 07701 Jena, Germany
>Tel.: +49-3641-643719, -643825
>Fax:  +49-3641-643710
>e-mail: [log in to unmask]
>
>***************************************************************************
*****
>
>

David A. Pepper
School of Biological Sciences
The University of Sydney, NSW 2006, Australia.
Phone +61 2 9351 3078, Fax +61 2 9351 4119
Email [log in to unmask]