Peak Area Measurement; Determination Of The Area - Agilent Technologies 8453 Operator's Manual

4
Integration

Peak Area Measurement

Peak Area Measurement

The final step in peak integration is determining the final area of the peak.
Peak areas are calculated from the contents of the cardinal point file. Cardinal
points are the points chosen by the integrator to define and quantify a peak
(see
baseline points, valley points, peak apex, points at peak half height. Cardinal
points have a horizontal coordinate of elapsed time, a vertical coordinate of
height from the baseline, area, and other parameters that the integrator uses
to calculate the peak areas.
Figure 24
In the case of a simple, isolated peak, the peak area is determined by the
accumulated area above the baseline between peak start and stop (identified
by tick marks).

Determination of the area

The area that the integrator calculates during integration is determined as
follows:
• for baseline-to-baseline (BB) peaks, the area above the baseline between the
102
"Identifying the Cardinal Points of a Peak"
Area measurement for Baseline-to-Baseline Peaks
tick marks, as in Figure 24
on page 76). These include
on page 102,
Understanding Your Agilent ChemStation