Stable Isotope Geochemistry


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Jan Kaiser <[log in to unmask]>
Reply To:
Stable Isotope Geochemistry <[log in to unmask]>
Wed, 18 Feb 2004 11:30:04 -0500
text/plain (59 lines)
Tsunogai and colleagues have used CO2 as a reference gas for CO

Jan Kaiser

Tsunogai, U., F. Nakagawa, D.D. Komatsu, and T. Gamo, Stable carbon and
oxygen isotopic analysis of atmospheric carbon monoxide using
continuous-flow isotope ratio MS by isotope ratio monitoring of CO,
Analytical Chemistry, 74 (22), 5695-5700, doi: 10.1021/ac020290x, 2002

On Feb 18, 2004, at 09:22, H.A.J. Meijer wrote:

> Dear Colleagues,
> The question by Jean-Pierre Girard and the following discussion is
> most interesting to me, as we are in the process of buying a GVI
> Isoprome. Originally it was intended to be just for 2H of water, but
> presently we are discussing the extension to 18O as well. And that
> brings us into the CO buisiness. I did not realise these security
> problems before, and the discussion brings me to some questions:
> (1) Why would the CF use of the Isoprime (or the Finnigan equivalent)
> use more CO than the dual inlet? After all it is just the short
> reference pulse each time that uses the gas?
> (2) How can you run a dual inlet system in combination with elemental
> analyser  combustion/pyrolysis? Or do you just use the dual inlet
> arrangement as a smart kind of reference gas injector?
> (3) Did anyone try CO2 (with about 8% of CO+ formed in the source) or
> even enriched N2 (with 15N15N added) as a substitute for CO?
> regards,
> Harro Meijer
> --
> Prof. dr. Harro A.J. Meijer
> Centrum voor IsotopenOnderzoek (CIO), Rijksuniversiteit Groningen
> Nijenborgh 4, 9747 AG  Groningen, Netherlands
> tel +31-50-3634760   fax +31-50-3634738

Dr. Jan Kaiser
Department of Geosciences
Princeton University
Princeton, NJ 08544
Tel. +1 (609) 258-7428 (Office: Guyot Hall M45)
      +1 (609) 258-1303 (Lab: Guyot Hall M55)
Fax  +1 (609) 258-1274