Here also is a citation that uses a modified IRMS to measure Ar and N2
ratios in groundwater...

Martin, G.E., Snow,D.D., Kim,E., Spalding, R.F. 1995. Simultaneous
determination of argon and nitrogen. Groundwater 33(5):781-785

LW

-----Original Message-----
From: David A. Mucciarone [mailto:[log in to unmask]]
Sent: Friday, September 03, 1999 1:30 PM
To: [log in to unmask]
Subject: N2:Ar ratios on IRMS


Is anyone out there using IRMS either by inlet or continuous flow to
analyze disolved N2, O2 and Ar in water?

I have seen papers on this topic but they use a membrane inlet system
attached to a quadrupole mass spec. However, I have not found methods that
use IRMS. At the moment a group here is only interested in N2/Ar ratios,
but I would appreciate information on any or all of the above.Thanks in
advance for your input.

Cheers,

Dave


****************************************************************************
David A. Mucciarone
Laboratory Manager
Stanford University
Department of Geological and Environmental Sciences, 320
Stanford, CA 94305-2115
650-723-0817 (office) 650-725-2199 (fax)
Office - Green Earth Sciences Rm. 365
Stanford Stable Isotope Laboratory - Green Earth Sciences Rm. 332 & 334.
e-mail: [log in to unmask]
WWW: http://pangea.stanford.edu/isotope/dam
****************************************************************************