Meaning of "MS1 and MS2 resolution" and "MS1 and MS2: Unit" in a tandem mass-spectrometry parameter list
The term &quot;unit&quot; probably means the size of the isolation window used in the QQQ.  The term &quot;unit&quot; means the nominal isolation window is 1 Da (i.e. one mass &quot;unit&quot;) wide.
The &quot;resolution&quot; is a standard term in mass spectrometry, and here they are saying it is about 1 Da.