92 Understanding Your Agilent ChemStation
4 Integration
Baseline Allocation
Figure 13 Standard baseline tracking and baseline tracking (no penetration)
Advanced Baseline Tracking
In the advanced baseline tracking mode, the integrator tries to optimize the
start and end locations of the peaks, re-establishes the baseline for a cluster of
peaks, and removes baseline penetrations (see Figure 12 on page 91). In many
cases, advanced baseline tracking mode gives a more stable baseline, which is
less dependant on slope sensitivity.
Peak Valley Ratio
This user-specified parameter is a constituent of advanced baseline tracking
mode. It is used to decide whether two peaks that do not show baseline
separation are separated using a drop line or a valley baseline. The integrator
calculates the ratio between the baseline-corrected height of the smaller peak
and the baseline-corrected height of the valley. When the peak valley ratio is
lower than the user-specified value, a drop-line is used; otherwise, a baseline
is drawn from the baseline at the start of the first peak to the valley, and from
the valley to the baseline at the end of the second peak (compare Figure 13 on
page 92 with Figure 14 on page 93).
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NOTE
Baseline tracking (no penetration) is not available for solvent peaks, with their child peaks
and shoulders.
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