Interpret chromatogram and integration intervall

[Samba_Zero]

Hi,

I am a beginner in gas chromatography and I still have difficulties with the interpretation of peaks in the chromatogram.

My question on this would be, how can I interpret this measurement from my standard.



What can the smaller peak be and how should I integrate?

And what I also still don't understand is, why does the base line rise so much, after the peak of the solvent?

[tom jupille]

You have given nowhere near enough information to allow specific answers, but in VERY general terms:

1. the mystery peak could be anything:
- a degradation product from your standard ?
- a contaminant in your standard or your diluent ?

2. the rising baseline is most probably associated with the increase in temperature (assuming you are temperature programming, not isothermal):
- some detectors are more sensitive to temperature effects than others
- some stationary phases are more volatile than others and "bleed" as the temperature increases.