
Acquiring Spectra from the Sequence Control Panel
Voyager
™
Biospectrometry
™
Workstation User’s Guide 6-87
6
NOTE: Use plates without laser-etched sample
positions if you spot standard and sample as shown in
Figure 6-25.
2. Load the sample plate, select the position containing
sample and standard, and display the Sample View.
3. Note the logical x and y coordinates for a minimum of
three positions on the standard spot and a minimum of six
positions on the sample spot.
4. Create the two search pattern files using Windows
Notepad as described “Creating a search pattern file” on
page 6-47.
6.7.7.4 Internal Standard
Calibration Considerations
This section includes:
• Optimizing unknown and standard concentration
• Determining if standard suppresses signal from unknown
• Creating a search pattern file for internal calibration on
separate spots
Optimizing
unknown and
standard
concentration
Before combining sample and internal standard, determine the
concentration of each that yields optimum signal intensity
without saturation.
To optimize relative peak intensities, determine the peak
intensity of the sample, and adjust the concentration of the
standard to bring the standard peak intensity into the same
range.
Determining if
standard
suppresses
signal from
unknown
In some cases, standard signal can suppress unknown signal.
Mix optimized concentrations of standard and unknown and
analyze to determine if you see adequate signal for all
compounds.
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