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'Spiking' ECD signal

Question asked by tksilver on Sep 22, 2019
Latest reply on Nov 14, 2019 by james_jenkins

Hi there, 

 

I noticed recently that the ECD back signal on Agilent GC 7890 (using it for trace gas analysis) is oddly spiking (while the FID is a straight, consistent line). It never used to do this. I just recently changed the inlet septum, could this be as a result of incorrect installation of the new septum? I've attached a screenshot of what it looks like. Am I still ok to run my samples, or is this a serious issue?

 

Thanks!

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