Brian,

The flow rate of a gas through a capillary is temperature dependant so your
observations are normal.

Sorry, no suggestions.

Anthony


 
------------------------------------------------------
Anthony L. Michaud
W. M. Keck Foundation Laboratory for Environmental Biogeochemistry
Department of Geological Sciences
Arizona State University
Tempe, AZ 85287-1404
 
Tel: 480-727-8033
Fax: 480-965-8102
 
Mailing address:
 
Anthony Michaud
PSF-686
Arizona State University
Tempe, AZ 85287-1404
 
***Windsurf Everywhere***
------------------------------------------------------
 
-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf
Of Brian M. Giebel
Sent: Wednesday, November 09, 2005 10:20 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] Reference Gas Peak Size Changes with Temp.

Greetings,

I'm using GC-C-IRMS and I'm having a problem with my reference CO2.  The
reference gas is plumbed directly into the GC oven, flows through the
combustion furnace and nafion water scrubber, and finally to the mass
spec.

It seems that as my GC oven temperature increases, my reference gas peak
sizes decrease.  Has anyone witnessed this on their system?  Any
suggestions?

Cheers,

Brian




Brian M. Giebel
UM-RSMAS
Division of Marine & Atmospheric Chemistry
Office: 305-421-4724
Cell: 631-662-4931
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NEW OFFICE TELEPHONE EXCHANGE 305-421-4724
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