You can try Messer-Griesheim IR reference gasses. They have references at
about -200 and -400 permil in 1 litre (200 bar) containers you can fit with
a 3/8 Swagelock directly on your D.I.
=46or further information, contact with:

Miss Schmidt
Messer Griesheim GmbH
W=F6rthstrasse 170
D-47009 Duisburg- Germany

I dont know if they have a 3W page, but they may offer me a free IR-tank
for advertising!!
Bests

Pat


>
>I am currently studying D/H in atmospheric methane.  I require a supplier o=
f
>a D/H isotopic reference gas with a value of circa -300 per mil (SMOW).
>Can anyone help?


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Patrick DAUBY
Universite de Li=E8ge
Laboratoire d'Oc=E9anologie
Unit=E9 de Recherche en Biog=E9ochimie des Isotopes Stables (URBIS)
B6 Sart Tilman
B-4000 Li=E8ge, Belgium
Phone: +32.4.3663322  -  3663307
=46ax: +32.4.3663325
Beep: 0454.700.671 (inside Benelux only)
WWW: http://www.ulg.ac.be/oceanbio/urbis.htm
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