GC-MS TQ 7010 inlet and column pressure low


I am running a GC-MS TQ 7890A/7010B coupled with a HS 7697A. The column installed is 30 m x .320 m x 1.80 um.

At a flow rate (constant flow) of 1.2 ml/min, the column/inlet pressure is only around 2.2 psi. Looking at my other GC-MS instruments, at this flow rate the pressure should be around 8-10 psi. I reinstalled the column and still experiencing the same pressure. What should be the typical operating inlet/column pressure?

I am having issues with Air/Water check and I believe it's related to the low pressure, if that is an issue at all.

Was this helpful?