Chromatography Forum

We have several HP5890's where we have had good success reaching our detection levels for chlorinated pesticides, toxaphene and pcb's. We have acquired some Agilent 6890 GC's equipped with micro-ecd's and can't seem to replicate the DL's achieved on the HP5890's. We are using Turbochrom for data collection/reduction. Any suggestions?

Hi!
6890 micro ECD is more sensitive than 5890....very more!
Have you check if you have the good column lenght at detector, good make-up flow, leak, capillary adaptor for ECD ect...?
I use Argon / Methane 5% for make-up gas, 60ml/min, 330celcius...