"Checkered" Pattern in Signals
Posted: Tue Sep 15, 2020 7:58 am
Hello all, I am recently having problems with my MS signals in our Headspace GC-MS setup. My peaks are well seperated, but the peaks themselves have either small sharp "shark-tooth" peaks on top, while some others have "checkered" patterns, like the wall of a medieval castle (my best descricption of them).
I have consulted several Trouble-shooting manuals but have not been able to find the exact description of my problem. The problem is with the MS part, as the FID-detector (we use a splitpoint) have nice, round signals.
We have tried the following:
- Purging the Column
- Cleaning the Ion-source of the MS
- "Purging" the quadropole (heating it to the limit for a couple of days).
Hope the question is understandable, and any input is welcomed.
Edit: Picture of the spectrum
Cheers, Carl
I have consulted several Trouble-shooting manuals but have not been able to find the exact description of my problem. The problem is with the MS part, as the FID-detector (we use a splitpoint) have nice, round signals.
We have tried the following:
- Purging the Column
- Cleaning the Ion-source of the MS
- "Purging" the quadropole (heating it to the limit for a couple of days).
Hope the question is understandable, and any input is welcomed.
Edit: Picture of the spectrum
Cheers, Carl