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What mechanism can cause this?

Posted: Fri Mar 07, 2008 9:28 pm
by SemiAuto
I made a 50% toluene 50% tetradecane by weight standard, mixed, and got 27% tol and 73% tetradecane by Area% on my 5890 Series II TCD detector!!! I shot the same mixture on a 6890 with same conditions and got 52% toluene and 48% tetradecane by Area% on its TCD (which is what I expected). Has anyone ever seen this type of discrepancy or have any idea what is wrong with the 5890?

Thanx for your time.

Posted: Mon Mar 10, 2008 7:58 am
by Peter Apps
My money would be on inlet discrimination.

Peter