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Date: | Wed, 4 Mar 2009 14:20:25 -0600 |
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Thanks for everyone's input on this issue! I haven't yet solved the problem, but this has given me much food for thought. I'll post some follow-ups when (if) I've figured this out.
While I would like to solve the problem, I have noticed good results as mentioned here by Marc. My concern about ignoring this issue though, is that if in fact the culprit is NO (as suggested by Willi -- which makes sense to me), would this not represent some scavenging of N2 and therefore some amount of error in the true value of 15N? In other words, wouldn't there be some fractionation in the ionization of N2 -> NO? I'll leave the answer to more sage users...
Best,
Mike
-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Ruppenthal, Marc
Sent: Wednesday, March 04, 2009 1:24 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] AW: [ISOGEOCHEM] Mass 30 Abnormality
Dear Isogeochemers,
i intensely pursued the discussion about the mass 30 abnormality and I have an additional question on this: Does this abnormality affect routine delta 13C and delta 15N measurements?? In Mainz University we use an isoprime coupled to an EA (elementar, Germany) and I also observe the "mass 30 sabertooth" after nitrogen reference gas injection, but, as measurement results are good, I do not further care about that...do I behave right or wrong in that point...?
Looking forward to your comments,
Marc Ruppenthal
Mainz University
Soil science group (Prof. Wilcke)
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