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- Posts: 2
- Joined: Thu Sep 17, 2009 3:36 pm
Hello!
We' set up here a GC for greenhouse gases analysis, and i'm afraid w're experiencing a few troubles with our ECD...
Accuracy is really far from what we were expecting, and something strange is happening with our N2O peaks...
The fact is that a kind of negative ghost peak appears just before the N2O peak onto the chromatogram.. How can it be possible?
I firstly though that it could be due to oxydation of the detector, so.. Flushed with hydrogen during the hole night at medium temperature. Result : Still not ok...
I also tried to fit it by modulating gas flow rates, Detector T°, and oven temp, but it doesn't go better!
Actual settings are
Carrier gaz N2 20 psi
Makeup gas N2 10 psi
DEtector temp 350 °C
Oven temp. 50 °C
Detect Tension 300 mV
I hope someone could give me some informations
Have a nice day
Guillaume
We' set up here a GC for greenhouse gases analysis, and i'm afraid w're experiencing a few troubles with our ECD...
Accuracy is really far from what we were expecting, and something strange is happening with our N2O peaks...
The fact is that a kind of negative ghost peak appears just before the N2O peak onto the chromatogram.. How can it be possible?
I firstly though that it could be due to oxydation of the detector, so.. Flushed with hydrogen during the hole night at medium temperature. Result : Still not ok...
I also tried to fit it by modulating gas flow rates, Detector T°, and oven temp, but it doesn't go better!
Actual settings are
Carrier gaz N2 20 psi
Makeup gas N2 10 psi
DEtector temp 350 °C
Oven temp. 50 °C
Detect Tension 300 mV
I hope someone could give me some informations
Have a nice day
Guillaume
