Chapter 3 Peak Detection and Labeling

Column header buttons

Figure 3-23 User Label Setup Dialog Box

3

4.Select the Label Type (spectra only):

Mass— Labels with Apex or Centroid mass.

Mass difference from adjacent peaks— Applies the labels to peaks that have the specified mass difference relative to the adjacent labeled peak of lower m/z.

5.Select Match Charge State (spectra only) if you want the charge state of a peak evaluated before applying the user label. When this function is enabled, a peak must occur within the specified Mass Tolerance (described below), and have the specified charge state before the user label is applied.

Hint: The Match Charge State function allows you to screen out peaks that are within the specified Mass Tolerance, but are not the charged species you are interested in.

3-62 Applied Biosystems