Perkin Elmer ICP-MS 2000 Question
So, my Nexion ICP-MS 2000 has gone crazy and I think I know what the issue is, but not entirely sure.
The vacuum is at 10^-6 (used to be 10^-7, but I can't find any leaks and all seals are new).
With plasma on or off, there's a constant 100cps for the background and the STD Perf Chk analytes. I've cleaned the interface, have new cones, new nebulizer, new tubes, new torch, and a new cyclonic glass chamber.
Intensities are terribly low (torch gets to maybe 3000), and setups for nebulizer, mass Cal (for Li and Mg), and Detector voltages fail.
Dual Detector and QID technically go but with crap numbers.
I am thinking it is the preamplifier for the detector causing issues since the background and STD Perf Chk analytes are consistently at the same numbers instead of jumping around, and the detector is still catching analytes, just not low masses.