HP Data Explorer 4 Series - Manual (Page 327)

Voyager Data Examples
Data Explorer ™ Software User’s Guide 7-11
7
7.2 Voyager Data Examples
This section includes:
• Detecting and labeling partially resolved peaks
• Processing before calibrating to optimize mass accuracy
• Detecting peaks from complex digests
7.2.1 Detecting and Labeling
Partially Resolved Peaks
If peaks are not
labeled
If peaks are partially resolved and the peaks of interest are not
labeled, you can adjust the following peak detection
parameters:
Figure 7-9 shows a spectrum with partially resolved peaks that
represent two compounds.
If... Adjust the following...
Peaks represent two
compounds, and you
want both peaks labeled In the Peak Label dialog box, select Allow Overlapping
Peak Labels.
OR
On the Basic Settings tab in Peak Detection, set %Max
Peak Area to 0, then adjust the %Base Peak Intensity
until peaks are detected.
OR
On the Peak Processing tab in Peak Detection, change
the default Integration Baseline Setting from
Valley-to-Valley to Valley-to-Baseline.
Peaks represent partially
resolved isotopes, and
you want to label and
detect the average mass On the Basic Settings tab in Peak Detection, decrease
the Mass Resolution setting until the isotopic envelope is
detected.