Dear Nico,
we use a Supelco / Sigma Aldrich Carboxen 1010 PLOT column (0.32 ID, 30 
m) for separation of permanent gases, such as O2, N2, CH4, CO2. It would 
also separate CO and the retention time is clearly deviating from the 
timing of N2. The column also separates O2 and N2 if operated at 30 °C


Am 05.01.2017 um 12:38 schrieb Herbert Tobias:
> Hi Nico,
> Just to put out an unconventional choice of column to try is the 
> GS-GasPro (Agilent). I do not know how it would handle large amounts 
> of CO and N2, etc... but I have used it for excellent separations of 
> CO and C2H6, CO2, and other natural gas products from pyrolyotic 
> processes.
> Regards,
> Herb
> On Jan 5, 2017 5:38 AM, "Küter Nico" <[log in to unmask] 
> <mailto:[log in to unmask]>> wrote:
>     Dear Community,
>     We are curious about an efficient way for separating N2 from CO in
>     a GC to analyze CO for d13C and concentration.
>     We are already able to separate the species somewhat sufficient
>     with 1) an Agilent 30m GC Carbonplot (0.32mm widebore, 1.5um film)
>     by pushing it far below its lower temperature-limit (-70°C) and 2)
>     quite well with an Agilent 50m PoraplotQ (0.32mm widebore, 10um
>     film, also at -70°C). We use a HP 6890 GC that is coupled to a
>     Delta V IRMS.
>     The important point is that we also need to analyze coexisting
>     CO2, CH4 and C2H6. So these should not get lost during the
>     separation process.
>     Again, the Poraplot Q does a good job, but we are curious if
>     anyone in this community has experience with other columns or with
>     the N2-CO separation in a GC in general.
>     Thanks a lot and best wishes for the New Year!
>     Nico
>     ----------------------------------------------
>     Nico Kueter
>     Institute for Geochemistry and Petrology
>     ETH Zürich
>     NW E-75.1
>     Clausiusstrasse 25
>     8092 Zürich
>     Switzerland

Dr. Klaus-Holger Knorr
Dipl. Geoecology Univ.

Institute for Landscape Ecology
Ecohydrology and Biogeochemistry Group
Heisenbergstr. 2
University of Münster
48149 Münster

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Phone: +49-251-83-30207