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- Posts: 3
- Joined: Wed Mar 22, 2017 7:03 pm
I am using GC to analyse gas samples containing N2, O2, CO and CO2.
My detector shows a peak for N2, O2 and CO but NOT for CO2.
This is fine - it is the CO peak that is interesting to me and I do not need to observe the CO2 peak.
My question is: WHY can I not observe CO2?
I am writing my thesis and trying to explain why CO2 is not observed and I can't seem to find any information online. Does it adsorb to the surface of the column? Is it to do with particle size?
I am using a Perkin Elmer Arnel autosystem XL GC using a molecular sieve packed column fitted with a TCD, H2 was used as the carrier gas.
Any help would be much appreciated.
Kind regards,
Natalie