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Chapter 5 Examining Spectrum Data
5-30 Applied Biosystems
5
2. From the Peaks menu, select Peak Label, then set the
Mass Label Type to Centroid.
NOTE: For spectra containing broad peaks that have
unresolved adducts or impurities such as proteins, you
may obtain better results if you use apex instead of
centroid settings.
3. From the Process menu, select Mass Calibration, then
select Automatic Calibration.
The Automatic Calibration Settings dialog box is
displayed (Figure 5-7).
Figure 5-7 Automatic Calibration Settings Dialog Box
4. Click Select New File, then select a calibration reference
file. For information on creating a reference file, see
Section 5.3.3, Creating or Modifying a
Calibration Reference File (.REF).