Dear All,

does anyone know a supplier for CH4 gas with a certified delta 13C value at
natural abundance (around -45 permil) and/or enriched with a few hundred
permil?
I tried Messer Griesheim, but they don't have it.
Are there more people working on determining delta 13C from CH4, either
from emissions or air? It would be interesting to share some experiences.

Thanks!


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Richard van Logtestijn
Vrije Universiteit
Faculty Biology
Department of Systems Ecology
De Boelelaan 1087
1081 HV Amsterdam
the Netherlands
tel +31 20 4447247
fax +31 20 4447123
e-mail : [log in to unmask]
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