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Measuring Ethylene in 7890A

Question asked by tudorobin on Sep 28, 2020
Latest reply on Oct 1, 2020 by stevenh12stevenh12

I am currently about to measure a mixture of ethylene and ambient air with an Agilent 7890A. I want to inject it manually with a syringe in to the front inlet, following to this method 


The columns are 19095P-Q04 and 19095P-MS0.

No matter what I changed, I see only 2 peaks, which I would identify as Argon and Nitrogen with reference measurements. How is this possible?


Thanks and best regards