I'm completely new to GC/MS and need all the help I can get. I tried running a method today and all I see is a triplet of peaks repeating itself. It doesn't change even if I change the method. I have no clue what I am looking at. What am I seeing?

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  wcody over 3 years ago +1 verified
  The signal in the original post is a test signal generated by the software. The problem is likely in your GC method parameters. Depending on the age of your software, when you go to GC parameters…
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  paulsalverda over 2 years ago in reply to Rishabh +1
  That signal is a GC detector test signal, not the MS signal. Read the answers above as they explain why this beautiful plot appears.