Understanding Your Agilent ChemStation 97
Integration
4
Baseline Allocation
You can disable exponential skimming throughout the run by setting the value
of the tail skim height ratio to a high value or to zero.
Valley Height Ratio is the ratio of the height of the child peak above the baseline
(Hc in Figure 19 on page 96) to the height of the valley above the baseline (Hv
in same figure). This ratio must be smaller than the specified value for the
child peak to be skimmed.
Calculation of Exponential Curve Fitting for Skims
The following equation is used to calculate an exponential skim (refer to
Figure 22 on page 98):
Hb = Ho × exp (- B × (Tr - To)) + A × Tr + C
where
Hb = height of the exponential skim at time Tr
Ho = height (above baseline) of the start of the exponential skim
B = decay factor of the exponential function
To = time corresponding to the start of the exponential skim
A = slope of the baseline of the parent peak
C = offset of the baseline of the parent peak
Figure 20 Values used to calculate an exponential skim
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