Chromatography Forum

Posted: **Sat Sep 30, 2006 2:01 am**

What causes negative peaks or negative humps in a GC-ECD, even in a dry run (no injection), an air injection or in a blank solvent (hydrocarbon) injection ? What are the remedies for these random and/or non-random phenomena?

Thanks.

Posted: **Sat Sep 30, 2006 4:08 am**

Hi,
There could be a gas leak in the system.

Posted: **Mon Oct 02, 2006 2:30 pm**

Hmmmmm....most likely NOT a leak....but sounds like a dirty cell..have it cleaned or replaced.

Chromatography Forum

Electron Capture Detector

Electron Capture Detector