by
dblux_ » Wed Sep 07, 2022 8:40 am
SherryGC-MS wrote:
Hi there,
I am using my CP WAX 57CB column for a GC-FID with a 1.2 ml/min flow rate (He) and the pursue is very high 134 kPa. I removed the column and cut 1cm and connected the pressure was still high. The FID got to 2000 pA (did a blank injection).
I really appreciate if you help me to solve this issue.
Thanks in advance.
Think of a column as a restrictor. Column ID and lenght is more important than type of a column.
Check if your column isn't clogged and whether it is properly installed.
What were the circumstances you noticed high pressure ?
Any maintinence works on inlet, column or detector.
What was the pressure earlier, before you noticed 134 kPa.
Is it configured properly in GC ?