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OLD GC/MS PROBLEM

Question asked by George Kenney on Aug 20, 2020

I have an old GC/MS 5972 MS and 5890 GC.  On firing up the system, if I turn off the main external pump to the MS, the MS will suck in pump oil to the MS.  How do I shut down such a system without this happening??  Plz reply to Chemistry@IrishmanSoftware.com

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