Spectrum

	Select Spectral Data	Allows to select from the spectra displayed in case there are more than one PDA spectra in the chromatogram.
	Add to Library…	Adds the selected spectrum to the spectral library (`Ctrl` + `A`). For more details see the description below the menu.
	Add All Identified Peaks	Adds the spectra of all identified peaks to the spectral library. For more details see the description below the menu.
	Search in Library…	Searches the library for matching spectrum (`Ctrl` + `F`). For more details see the description below the menu.
	Normalize Zoomed	Normalizes the spectra in the zoomed range. For more details see also chapter Spectral View.
	Normalize Whole	Normalizes the spectra on whole wavelength axis range. For more details see also chapter Spectral View.
	Normalization OFF	Turns the normalization off.

Add to Library

Adds the selected spectrum to the spectral library. Invoking the command, using the icon or the Ctrl + A shortcut invokes the Spectrum Property dialog, where user can name the compound and add comments to it before the spectrum is added to library. If the spectrum is already found in the library (matched by the same name), the user is asked to confirm the overwriting of the spectrum.

Spectrum Property

Compound Name

Serves for setting of the compound name.

Retention Time

Displays the retention time of the selected spectrum.

Comment

Allows the user to add custom comments.

Add All Identified Peaks

This command allows user to add all identified peaks in chromatogram all at once. Identified are all the peaks which corresponds to peak identified and named in calibration file. Peaks are added into the currently opened library.

Search in Library

Searches the library for matching spectrum. Invoking the command, using the icon, F3 shortcut or the Ctrl + F shortcut invokes the Spectral Library Search Options dialog.

Note:

Using the icon only opens the Spectral Library Search Options dialog if no values are pre-set. If any values have been used previously, using the icon will skip the dialog and perform the search according to the settings.

Spectral Library Search Options

Match Criteria

Sets the type of match factor calculation. Possible options are Least square, Weighted Least Square and Correlation.

Threshold

Only hits with match factor above the value entered will be displayed.

Max Hits

Limits the number of displayed spectra found by matching according to the other criteria.

Copy From Current Method

Copies the settings from the PDA method of the active chromatogram. In other words, loads the settings from the Chromatogram - Measurement Conditions - PDA tab.

Restrict Wavelength Range

The spectra comparison will be limited to the range specified in From and To fields (the whole overlapping range is compared when not checked).

Restrict Retention Time

Limits the found spectra only to those with the RT within the range specified in the Relative field (in % of peak RT).

Libraries

Specifies the libraries to be searched. Click the button to add a new line to the list and use the newly-emerged button to invoke the Open Spectral Library dialog where you can select the Spectral Library to be opened. Check/uncheck the checkbox next to the library to include/exclude it in the search.