0 Replies Latest reply on Dec 3, 2018 6:00 AM by dmarchini

    Negative peaks in gas analysis with Agilent 490 Micro GC

    dmarchini

      Hello

      lately i have negative peaks problem with my Agilent 490 Micro GC, set up is:

       

      -helium carrier gas

      -moisture/oxygen filter

      -column 4m 5CB heated injector

      -micro TCD detector

       

      I analyze a gas stream from the production site, mainly nitrogen polluted with hydrocarbons.

       

      The micro GC is installed since 1year and a half and works 24h a day, I occasionally shut it down or bake the system like one times a month.

       

      Could be the inline GENIE 170 filter? I never changed it.

       

      Thanx, help is appreciated

       

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