1 Reply Latest reply on Sep 19, 2018 5:18 AM by james_jenkins

    Packed column on 7890



      I am trying to run a packed column on a 7890 GC.  As far as I know, the system is setup correctly in terms of hardware.  I am pretty new with packed columns on an Agilent GC, so I am not sure where to even begin in terms of method settings.

      I am looking for optimal method settings.  I am running phenethyl alcohol as a standard with He as the carrier.  What are typical flow rates and oven ramps?

      Currently, I am only getting a solvent front (MeOH) that is about a minute long and no phenethyl alcohol peak. Below is my current method.

      Thank you in advance for any advise!

      Oven Temperature:  Initial

      120° C  Rate 20°C/minute


      200°C (hold 3 minutes)

      Injector Temperature


      Inlet flow

      25 mL/min

      Control Mode


      Detector Temperature


      Air Flow

      450 mL/min

      H2 Fuel Flow

      40 mL/min

      Makeup Flow: He

      45 mL/min

      Injection Volume

      1.0 µL

      Packed Column

      Suppleco 80/100 Mesh 2 m x 2 mm 5% FFAP or Equivalent