MS oil contamination?

Discussions about GC-MS, LC-MS, LC-FTIR, and other "coupled" analytical techniques.

21 posts Page 2 of 2
Thank you. I'll let you know after I change the rough pump oil.
Changing diffusion pump oil and cleaning the pump did not change anything on the autotune.
Wiped the analyzer chamber again with Methylene Chloride. Still no change.
Changing out the rough pump vacuum hose and convectron gauge did the trick. The gauge had too much oil to clean out with solvent which I have done in the past.
Good to hear you have it solved!
Thanks for the help.
I had a backstreaming incident as well. I cleaned everything multiple times: hexane, ipa, 1nhcl, water, lcms water, ipa, meoh. My signal is too low. Can anyone help pinpoint my issue?
21 posts Page 2 of 2

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