2 Replies Latest reply on Jun 29, 2018 5:53 AM by james_jenkins

    GC - TCD with N2 carrier gas


      I have agilent GC-TCD agilent HP7890B with helium carrier gas . I want to check mixture of CO2(1 %) , Helium(49 %) and argon balance . The TCD reference gas is Helium so helium peak will not eluted and customer is asking me for chromatogramme with all three peaks . So the only solution is to change reference gas to Nitrogen  all peak of mixtures will be in one chromatogram . 


      • Is there any intelligent way to change only TCD reference gas without carrier ?
      • What is other solution to let all peaks eluted in one chromatogram ?
      • What is the best practise of changing carrier gas of TCD ?