Dear Peter,

Maybe this publication could be useful for you:
G. Haberhauer, K. Blochberger; "A simple clean up method for the isolation
of  nitrate from natural water samples for O -isotope analysis." Analytical
Chemistry 71, 3587-3590 (1999).

Best Regards

Sophie

----------------------------------------------------------------------
Dr. Sophie Zechmeister-Boltenstern
Institute of Forest Ecology
Soil Biology

Federal Forest Research Centre
Seckendorff-Gudent Weg 8
A-1131 Wien

phone: +43-1-87838/1304
fax: +43-1-87838/1250
e-mail: [log in to unmask]
URL:http://www.fbva.bmlf.gv.at

> -----Ursprüngliche Nachricht-----
> Von:  Peter Vervloedt [SMTP:[log in to unmask]]
> Gesendet am:  Mittwoch, 30. August 2000 11:28
> An:   [log in to unmask]
> Betreff:      [ISOGEOCHEM] 18O in nitrate - references wanted
>
> Dear listmembers,
>
> We would like to start measuring 18O in nitrate, since we're doing
> research
> on nitrification/denitrification. We're just getting started with this
> project and our experience on this field (18O) is limited. That is why I
> call for your help.
>
> Can any of you provide me references on the topic (specifically 18O in
> nitrate in water samples)? We could also use an operating procedure on how
> to prepare the samples before measurement.
>
> We are working with Europa-Uk's Anca-SL, which will be modified to be able
> to measure 18O in liquids. Until now we only measured 13C and 15N, so all
> tips and guidelines on the measurement of 18O using this type of equipment
> would also be very welcome.
>
> I thank you in advance for your time and hope to hear from you soon!
>
> Best regards,
>
> Peter.
>
> ________________________________________
>
> Peter Vervloedt
> Laboratory of Applied Physical Chemistry
> Ghent University
> Coupure, 653
> 9000 Gent
> Belgium
>
> tel.: +32 (0)9 264 6048
> fax.: +32 (0)9 264 6230
> e-mail: [log in to unmask]
> ________________________________________