PPA: Peak Purity Analysis) to check the peak purity. The PPA window displays the 3D Field of a sample if there is a corresponding raw data file. This is the case if the 3DFIELD channel was selected for Data Acquisition.Analyzing the Peak Purity
Use the PPA window (see Data Representation and Reprocessing PPA: Peak Purity Analysis) to check the peak purity. The PPA window displays the 3D Field of a sample if there is a corresponding raw data file. This is the case if the 3DFIELD channel was selected for Data Acquisition.
The 3D field in the lower right-hand window section has cross-wires. With the mouse, the axes can be moved separately or together. The spectrum or chromatogram extracted along the current y and x-axis will be displayed on the left or above the 3D field.
Move the y-axis of the cross-wires to display all spectra of the active chromatogram in succession
Move the x-axis of the cross-wires to display the appearance of a chromatogram at different wavelengths.
The status bar shows the retention time, wavelength value, and signal height of the current cross wire position.
To evaluate peak purity, use the following methods:
Visual Check of Iso Line Plot
PPI and PPI Match Factor
Normalized Spectra Overlay
Peak Inhibition via Virtual Channels
Multiple Ratio