Alternate GC Carrier Gas: Helium to Nitrogen, 30m x 0.25mm x 0.25µm Column to 20m x 0.15mm x 0.15µm Column

I sent my earlier post, “Switching from Helium to Nitrogen Carrier Gas for GC by Switching from a 30m x 0.25mm x 0.25µm Column to a 20m x 0.15mm x 0.15µm Column” to Roy Lautamo at Restek West for review, as he has a critical eye for particulars.  He wanted to see finer detail in the elution area starting around 1400 sec in the first figure and took a sideways swipe at me by calling what I showed “chromahistograms”.  Indeed!  He also asked about peak widths, so I post some here for comparison, and I even included elution temperatures.  The zoomed in chromatograms in that 1400+ sec region look very similar to me.

Compare He N2 1

1400 Compare

3 Responses to “Alternate GC Carrier Gas: Helium to Nitrogen, 30m x 0.25mm x 0.25µm Column to 20m x 0.15mm x 0.15µm Column”

  1. jaap says:

    as it should be.. (:))

  2. Dear Jack & Jaap –

    Very nice work, but hard to belive ….. -:) So …. now nitrogen together with helium and hydrogen, also has to be to considered, when selecting carrier gas for capillary gas chromatography applications…. Could you gentlemen please develop a “pro and cons” users guide for this purpose?

    With kind regards –
    Lars Kurstein, Copenhagen

  3. jaap says:

    Hi Lars,
    we first did the math, and then proof is done in the lab. The use of a POLAR column in the “test-of-concept” makes it even more critical.
    This concept will for sure also work with less polar phases like the Rtx-1, 5, Rxi-5ms, XLB, 35sil, etc

    so besides guaranteed availability, production in the lab, ,there is quite some $$ to be saved if Helium is replaced by N2..

    rgds
    jaap

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