Location:
Report Variable (Peak Results)
Dimension:
signal unit * number (depends on the used detector type; for UV detectors, usually mAU * min (milliabsorbance minutes))
Default:
Full peak area
Related Variables:
Description:
The Area peak result variable specifies the area between the signal curve, the baseline, and the perpendicular delimiters, if required.
The (resolved or non-resolved) baseline considerably influences the size of the peak area.
Rider peaks have a separate area that is limited by a skimming curve and the signal curve.
The peak area is computed from the summation of trapezoids. The trapezoidal area between the two data points (T1,A1) and (T2,A2) is
After the corresponding trapezoids of all data points have been summed up, the baseline is subtracted. For the (B_T1,B_A1) and (B_T2,B_A2) baseline points at peak start and at peak end, the baseline area is computed as
The areas of the rider peaks are computed accordingly and subtracted from the corresponding main peaks.
Parameters:
Full peak area
Displays the entire peak area (default).
Peak area in retention time range
Displays the peak area for a certain user-defined retention time range.
Tip:
To determine the retention times, you can use report variables instead of numerical values. This may make sense, for example, to display the area for that part of a peak part that is in a certain tube. In the Formula field, enter peak.area(tube.start_time,tube.end_time).
