Applied Biosystems Data Explorer 4 Series User Manual page 158

Chapter 3 Peak Detection and Labeling
Charge state
not displayed
3
3-60 Applied Biosystems
If no charge is displayed, there are a few possible causes:
• Peaks are more than 1 Da apart.
• Filter width is set too high to detect other isotope peaks.
• The maximum charge state for charge state
determination is set lower than the charge state of the
peak.
• Charge state determination parameters are set such that
peaks are determined to have no charge. See
Section 3.2.5, Charge State Determination and
Examples.
• Peaks are not from the same isotope species.
NOTE: If you set %Base Peak Intensity or %Max Peak
Area too low (described on page 3-20), noise peaks
can be detected, and charge states can be incorrectly
labeled.