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7.3.4 Average Mass Spectra

Sometimes, the single scan spectrum selected from the peak apex is not the most accurate mass spectrum (due to an experimental artifact called 'tilting'). For this reason, it is usually better to average the spectra collected during the entire chromatographic peak. To do this, place the cursor on the first scan to be included in the average; press and hold the right mouse button, and drag the cursor to the last scan to be included. When the right button is released, the average spectrum will be displayed.

Exercise: Display the average spectrum over one (or several) of the chromatographic peaks in the file EVALDEMO.D.

John S. Riley, DSB Scientific Consulting