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- Posts: 13
- Joined: Fri Sep 11, 2020 10:47 pm
I am using agilent 7890GC 5975MS for SPME analysis, scan range 28-200. recently I found small and sharp peaks in the chromatogram (sample and also blank) m/z is 28, they appear constantly at intervals through the whole chromatogram, I have no clear idea what's the problem.
Thank you in advance for your suggestions.