ECD oxidation

[Hiz]

We are running an SRI GC in combination with an automated chamber system in field. Today I noticed both carrier and make up gas cylinders were empty while GC was still running. Does this mean ECD has been oxidized for sure? If yes, is there a chance it might still be usable or it has to be replaced now? Sorry if this topic has been discussed before.

Thanks
Hiz

[chromatographer1]

There is only one true way to determine this.

best wishes,

Rod

[Hiz]

Hi Rod,

I've run the system and visually it seems OK; i.e. all N2O and O2 peaks appearing as they should. Not sure if I need to run any sensitivity tests. If yes, how?

Thanks
Hiz

[Don_Hilton]

I assume you run a low standard every now and again to confirm sensitivity?