New to GC FID

Hi Revathy,

These are electronic noise spikes. Typically when you see a sharp spike with no area under the peak/ spike this is from the fid or fid electronics. The fid collector has a spring connection for the signal to the electrometer and dirt or corrosion can cause spikes like you are seeing. I would suggest taking the FID apart and cleaning the collector assy and changing the jet as a first step. I have attached a section from the 7890 manual that covers FID maintenance. The procedures in the manual apply to other Agilent GC models as well as the FID assemblies are all similar. I hope this helps.

Regards

James

Hi Revathy,

These are electronic noise spikes. Typically when you see a sharp spike with no area under the peak/ spike this is from the fid or fid electronics. The fid collector has a spring connection for the signal to the electrometer and dirt or corrosion can cause spikes like you are seeing. I would suggest taking the FID apart and cleaning the collector assy and changing the jet as a first step. I have attached a section from the 7890 manual that covers FID maintenance. The procedures in the manual apply to other Agilent GC models as well as the FID assemblies are all similar. I hope this helps.

Regards

James

Thank for that James.  Will try and let you know.

Regards

Revathy

Agree with electronic noise.  Additionally, opening and closing of the instrument lid can cause these sorts of spikes. 

Thanks Skuhl.  Now it is sorted out.