The following table defines parameters used in the Genesis algorithm for peak detection.
Parameter | Subparameter | Description |
|---|---|---|
Percent of Highest Peak | N/A | Specifies a percentage threshold to limit the number of peaks that are submitted for further processing. Range: 0.0–100.0; default: 10.0. |
Minimum Peak Ht (S/N) | N/A | Specifies the minimum S/N that a peak must equal or exceed to be detected. Range: 1.0 (all peaks)–999.0; default: 2.0. |
S/N Threshold | N/A | Specifies the threshold for detecting peak edges. The algorithm calculates the S/N by using the baseline signal. It excludes any extraneous or minor detected peaks from the calculation. Range: 0.0–999.0; default: 2.0. |
Valley Detection Enabled | Checkbox | Detects unresolved peaks. The valley detection approximation method drops a vertical line from the apex of the valley between unresolved peaks to the baseline. The intersection of the vertical line and the baseline defines the end of the first peak and the beginning of the second peak. |
Expected Width (sec) | N/A | Specifies the expected peak width (in seconds). This value controls the minimum width that a peak must have (if the user selects the Valley Detection Enabled option) to be detected. The algorithm always terminates a peak when the signal reaches the baseline, independent of the value set for the expected peak width. Range: 0.0–999.0; default: 0.0. |
Constrain Peak Width | Checkbox | Limits the peak width of a component during the peak integration of a chromatogram. |
Peak Height (%) | N/A | Specifies how much above the baseline (as a percentage) a signal must be (relative to the total peak height) before integration turns on or turns off. Range: 0.00–100.0; default: 5. |
Tailing Factor | N/A | Specifies a factor that controls how the algorithm integrates the tail of a peak. This factor is the maximum ratio of the trailing edge to the leading edge of a constrained peak. Range: 0.50–9.0; default: 1. |