Voyager DP-263-S Guía de usuario Pagina 425

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Acquiring PSD Data with Standard Instrument Settings (.BIC) Files
Voyager
Biospectrometry
Workstation User’s Guide 7-21
7
7.3.2 Determining the
Number of Segments to Acquire
for a Complete Composite Spectrum
This section includes:
Resolution and the number of segments
Decrement ratio
Default Mirror Ratio settings
Size of segments
Default number of segments
Acquiring only select segments
Resolution and
the number of
segments
If you are interested in a complete composite spectrum, the
number of segments you need to acquire is determined by:
Resolution you require
Mass range of interest
You see better resolution in the composite spectrum with more
segments.
NOTE: If you are interested in selected fragment masses
only, instead of a complete composite spectrum, see
“Acquiring only select segments” on page 7-23.
Use the following equation to determine the number of
segments to acquire:
where:
D
m
f
Fragment ion mass of the lowest mass of interest
Decrement Ratio, which determines the size of the segment=
=
n = Number of segments
m
p
Precursor ion mass=
n ~ ln (m
f
/ m
p
)
lnD
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