6 Method Parameters
Set the 2D-LC Method parameters
2D-LC User Guide 150
[OPTIONAL]
c Or set Threshold and Slope.
In Threshold and Slope mode, the 2D-LC cutting (peak parking) is triggered
when the corresponding values for threshold and slope are reached. If the
detector signal exceeds both the threshold and the Up Slope value, the
cutting of the fraction is started. If the detector signal drops either below
the Threshold or the Down Slope value, the 2D-LC Valve stops cutting the
fraction by switching the valve to the next position.
For more complex problems, like two overlapping peaks, it is possible to
combine slope and threshold collection. The two peaks will be split in two
cuts roughly around the local minimum between the two maxima.
• Threshold
This method detects peaks based on threshold values only. The height of
the peak triggers the peak cutting. The default value is 20.000 mAu
• Up Slope
This method detects peaks based on up slope values only. The slope of
the rising peak triggers the peak cutting. The slope value is based on the
first derivative of the signal. The default value is 1.00 mAu/s.
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