Chromatography Forum

Hi All,

I recently dirty soil samples through PyGCMS. Py unit is working fine after cleaning up the seals but GC pressure is failing to hold. The column is new, I changed the ferrules, changed the septum and split liner. It is still failing, I am wondering if I need to clean the split vent, I haven't cleaned it in 2 years. I am looking for instructional videos to clean it but I cannt find it. If you have suggestuions/recommendations please share. The unit is a shimadzu QP 2020NX with a GC-2030.

Thank you
Tasneem

I never worked with Shimadzu, just HP/Agilent; and on a couple of our units I had to clean out the split vent line. On at least one I increased the stainless steel tubing diameter.

I'd call Shimadzu and request instructions on how to do this.