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Chromatogram is weird... any ideas?

Posted: Thu Sep 28, 2017 2:18 pm
by YesPhycisist
Hi,

We tried to measure MTBE and different alcohols with a GC and instead of serious results we get the exact same periodical chromatogram everytime:

Every 1.5mins there is a very high peak with over 30000 counts. Right after that follows a peak 3000 counts and a peak with approx. 300 counts. Looks like some sort of test run to me...

What could be the reason for that? What could we do?

Thanks for help
~YesPhycisist

Re: Chromatogram is weird... any ideas?

Posted: Thu Sep 28, 2017 2:43 pm
by GasMan
The reason is that you have the test signal selected rather than the detector signal.

Gas man

Re: Chromatogram is weird... any ideas?

Posted: Thu Sep 28, 2017 4:30 pm
by Consumer Products Guy
The reason is that you have the test signal selected rather than the detector signal.

Gas man
Yes.