Electron Capture Detector

[Ashraf_Khan]

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.

[ntruong]

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

[L4br4t]

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