Chapter 4 Examining Chromatogram Data

Filtering event tags

4

Hint: Add mode is useful when you filter the same trace for different event tags. The original trace remains displayed and accessible. Each filtered trace (up to four total traces) is added, allowing for visual comparison.

To display chromatogram traces for selected event tags:

1.Display the data file containing the event tags.

2.Click the Chromatogram window to activate it.

3.From the Display menu, select Traces, then select the trace type to filter.

4.If you have more than one trace displayed, select the trace to filter.

5.From the Process menu, select Event Tag Filtering.

NOTE: If the Chromatogram window is not active, Event Tag Filtering is not displayed on the Process menu. If the active chromatogram was not collected with an MS Method that specified event tags, the Event Tag Filtering command is dimmed.

The Event Tag dialog box is displayed (Figure 4-10).

Figure 4-10 Event Tag Dialog Box

4-24 Applied Biosystems