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GCMS peak integrated but no response shown
Posted: Fri Jun 04, 2021 9:55 am
by samanthaaaaannm
Internal standard peak came out and integration also okay. But no response shown and retention time also shown as zero. Has anyone experienced this before? Please help! Thank you!
Re: GCMS peak integrated but no response shown
Posted: Fri Jun 04, 2021 1:09 pm
by Consumer Products Guy
Geez, Samantha: tell the folks what instrument and software/version you're using, you've provided almost NOTHING.
We don't need to know what you had for lunch, etc.
Re: GCMS peak integrated but no response shown
Posted: Wed Jun 09, 2021 9:02 am
by lmh
hard to answer a question without full information but here are some typical scenarios where most software will fail to give a response:
(1) peak area is outside the range of the calibration standards, especially if you're using a quadratic fit calibration curve
(2) you didn't run a calibration curve...
(3) processing was set to do integration but not calibration/quantification
(4) qualifier ions are too weak/not at the correct ratio, so the peak has been rejected even though the main quantifier ion looks fine