Permanent gas separation

What GC column is able to separate hydrogen, oxygen, and nitrogen with helium as carrier gas?

  • Best choice would be a mole sieve column.  Pic is from an older Agilent catalog.

    Be aware:

    It's best to use a pre-column that can be backflushed to keep heavy components off the mole sieve column.  CO2, water, and C2 and heavier hydrocarbons can take a very long time to elute from the column.  A PLOT Q column is frequently used for this.

    If you are using TCD with helium carrier/reference, hydrogen will have a very low response.  (Typically a second TCD with argon or nitrogen carrier is used for hydrogen quantitation.)

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