Agilent Technologies 5975 Operation Manual page 115

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When prompted, click OK to perform the methane Flow Adjust.
Figure 22 Reagent ion scans
5975 Series MSD Operation Manual for MassHunter
Examine the displayed profile scan of the reagent ions.
• There should be no visible peak at m/z 32. A peak there indicates an air
leak. Repair the leak before proceeding. Operating in the CI mode with
an air leak will rapidly contaminate the ion source.
• The peak at m/z 19 (protonated water) is less than 50% of the peak at
m/z 17.
Operating in Chemical Ionization (CI) Mode
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