Hello, I'm new here and having problems with FID Igniting and concentrations of standards and samples are lower than expected.
I'm using GC Agilent 7890B, GC ran out of air on the weekend, we replace the air tank today as usual and since the FID has problems igniting (unless someone blows on it). Already check for leaks, changed ignition copper washer, cleaned the FID Jet, cooked the column for about 10-15 minutes. After that standards concentrations were low. and FID wont light without blowing