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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]> 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
>