What is the reason for high Oxygen peak in TCD?

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Yurii V Geletii

What is your carrier gas in GC?

Hera Ahmed

we use Ar as a carrier gas.

Do you see the nitrogen peak? Inject a small amount of air as a control for air leak into your system.

yes, nitrogen peak is also high.

Your oxygen peak is from air leaking into your system

thank you so much i will check by air injection .