Chromatogram

	Add Signal	Adds or replaces the chromatogram signal with a new signal taken as a cut from the PDA data. For more details, see the description below.
	Display Peak Purity	Loads the currently selected peak (from the Chromatogram or Isoplot view) to the Peak Purity and Peak Purity Spectra views (`Ctrl` + `D`). For more details, see the description below.

Add Signal

Stores a cut of the PDA data on the selected wavelength/range of wavelengths as a signal in the current chromatogram.

PDA Data - Add Chromatogram Signal

Add

Add the new signal, gained as a cut at the selected wavelength, to the chromatogram containing the current spectrum.

Replace

Replaces the selected signal in the chromatogram containing the current spectrum by a new signal gained as a cut at selected wavelength. Replacing signals is not allowed for originally acquired signals, only new signals derived from spectra can be replaced.

Wavelength

Sets the new signal wavelength.

Bandwidth

Sets the bandwidth for the new signal (how much cuts will be taken and averaged to create the new signal).

Reference

If the Use checkbox is checked, the reference signal will be used for eliminating the uneven intensity of the lamp.

Note:

The reference wavelength should be set to the area of chromatogram where no peaks are present, e.g., where no compound absorbs.

Wavelength

Sets the reference signal wavelength.

Bandwidth

Sets the bandwidth for the reference signal.

Display Peak Purity

Selects the peak to be displayed in Peak Purity and Peak Purity Spectra views (Ctrl + D). When the time marker is over the desired peak in Chromatogram or Isoplot views, the Display Peak Purity command loads this peak to the Peak Purity and Peak Purity Spectra views. Invoking the function when the marker is not over any peak clears the views, which then display No peak selected label.