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- Posts: 2
- Joined: Wed Jul 02, 2014 3:27 am
i'm writing to you because i have a problem with a GC-FID equipped with HS (clarus 580+turbomatrix).
We are copying/building a method for the detection of a lot of solvents (methanol, acetone, benzene, ethanol, acetate, etc...).
We had already built this method onto another GC. The method is perfect and allow us to resolve all peaks.
We are copying that method onto the other GC.
The GCs are the same: same model, same method (HS-autosampler, injection, oven, flow, etc...) and equipped with the same column, but one GC is located at 200 m (altitude) and the other is at 2000 m.
With the 200m-GC we can resolve all peaks, but with the other we can't.
My question (probably stupid question, but i'm thinking about everythinks): the atmospheric/barometric pressure could affect time retention in gaschromatography?
because we have very big difference in time retention, especially for solvent with low boiling point.
I have no other idea for that shifting...
Thank you for your time!