Understanding Your Agilent ChemStation 99
Integration
4
Baseline Allocation
The valley height ratio takes the same value for both front peak skimming and
tail peak skimming (see "Valley height ratio"); the front skim height ratio is
calculated in the same way as the tail skim height ratio (see "Tail skim height
ratio"), but can have a different value.
Unassigned Peaks
With some baseline constructions, there are small areas that are above the
baseline and below the signal, but are not part of any recognized peaks.
Normally, such areas are neither measured nor reported. If unassigned peaks
is turned on, these areas are measured and reported as unassigned peaks. The
retention/migration time for such an area is the midpoint between the start
and end of the area, as shown in Figure 23 on page 99.
Figure 23 Unassigned Peaks
Peak Separation Codes
In reports, each peak is assigned a two-, three- or four-character code that
describes how the signal baseline was drawn.
Characters 1 and 2
The first character describes the baseline at the start of the peak and the
second character describes the baseline at the end of the peak.
%#)-'
%#*-&
%#-('
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