Hi, I need suggestion.
I have 7 years old shimadzu FID and new TG5 ms column.
When I tried to draw calibration (5,10,20,40,100 ppm) all calibration point give same area.
I have that problem before new column but I thought that column performance was low.
What could be the problem?

I am using hexane as solvent.
Can anyone share instrument method?
In fact I create a method same as 9377-2. Except I increased detector temp. but didn't help.

Any suggestion?