Chapter 4 Examining Chromatogram Data

From the Spectrum window

To create an extracted ion chromatogram for a mass range from the Spectrum window:

1.Click the Chromatogram window to activate it.

2.Select Duplicate Active Trace from the Display menu to keep the original data displayed after processing.

3.In the Spectrum window, right-click-drag over the mass region of interest in the extracted ion chromatogram. The width of the box you draw defines the precise mass range used in the extracted ion chromatogram.

The extracted ion chromatogram is displayed in the Chromatogram window (Figure 4-2)with the mass range indicated in the trace label.

Extracted ion chromatogram (center window)

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Figure 4-2 Extracted Ion Chromatogram

4.To return to the original trace, see “Returning to the original trace” on page 4-4.

4-8 Applied Biosystems