Agilent Technologies 8453 Operator's Manual page 361

Figure 9
The integrator processes merged peaks in the following way:
1 it sums the area of the first peak until the valley point.
2 at the valley point, area summation for the first peak ends and summation
3 when the integrator locates the end of the second peak, the area summation
Shoulders
Shoulders are unresolved peaks on the leading or trailing edge of a larger
peak. When a shoulder is present, there is no true valley in the sense of
negative slope followed by positive slope. A peak can have any number of front
and/or rear shoulders.
Understanding Your Agilent ChemStation
Merged Peaks
for the second peak begins.
stops. This process can be visualized as separating the merged peaks by
dropping a perpendicular from the valley point between the two peaks.
4
Integration
Peak Recognition
87