Hi,
I'm having some noise issues that I'm hoping someone can help me with.
I have a HP5890 GC and HP5970 MS. I recently fixed the injector
heater and replaced the column. It seemed to work OK for a while but
I have a high background (about 1E6). I tried reinstalling the column
a couple of times but now can't get any peaks at for a test mixture
(0.03% C14, C15, C16)not even for the solvent, just lots of noisy
spikes. The water level is a little high about 40%. I'm running out
of patience with it. Any advice?

Cheers,