Dear All,

We have a tank of CO that's showing 29/28 ratios of around 0.007 and 30/28
ratios of around 0.002.  The supplier, Air Liquide, says they make the CO
from natural gas, but that 29/28 ratio would put the delta 13C at around
-380 per mil PDB, which doesn't seem reasonable.  I figure we've either
been sold a tank of N2 pretending to be CO, or that there's something
involved in the production of CO that makes it really light that I don't
know about.  Has anyone else seen a tank of CO like this?  Any other
insights?

Thanks,

Bruce Hungate



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Bruce Hungate
Assistant Professor
Dept. of Biological Sciences
Box 5640
Northern Arizona University
Flagstaff AZ 86011-5640

phone:  520 523 0925
fax:    520 523 7500
email:  [log in to unmask]
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