Dear All:

I have a question on N2:Ar ratio measurement. Is it
possible to measure enriched N2 isotope (mass 29 and
30) by comparing with Ar peak? Whether all dual inlet
mass spectrometer can measure mass ratio of 29/40 and
30/40, just like 28/29 and 28/30? or any special
modification is necessary?

Any suggestion is welcomed!

Best regards

Tao

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