Chapter 5 Examining Spectrum Data

5.1 Overview
Types of spectra you can displayVoyager PSD spectra

You can display the following types of spectrum data:

•Single spectrum— Double-click any point in the TIC to display the corresponding spectrum.

•Combined spectrum— Click-drag across a region of the chromatogram to sum the intensity at each mass for all selected spectra. Combining spectra can improve peak shape, signal intensity, and signal-to-noise ratio.

NOTE: You cannot display a combined spectrum for Voyager single-spectrum data files.

•DAD spectrum (Mariner DAD data only)— Click the Chromatogram window, select Traces from the Display menu, select the DAD TAC or channel of interest, then double-click any point in the TAC or channel data trace to display the corresponding DAD spectrum.

Voyager PSD data files contain the precursor spectrum and fragment ion spectra. You can view up to eight spectra at a

time and can click and to display other fragment ions.

Creating macros to combine processing functions

You can create macros that perform multiple functions (for example, smooth and baseline correct), and then start the macro with one mouse click.

For information, see Section 6.7, Using the Macro Recorder.

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