Empower Tip: Compare Window

In this tip for Empower Chromatography Data System (CDS), we will learn how to visually align chromatograms using the Compare window.

It is common to want to align chromatograms from different injections due to variations in the chromatography from injection to injection. This is of particular interest when trying to identify peaks by retention time. This can be done in the Compare window.

From the Channels tab in the Project window highlight two or more channels, right click and select Compare.

The Compare window opens, and you can see the peaks are not aligned.

Select the Individual Plot tool to put each chromatogram in its own plot.

Click the Alignment Markers tool and each chromatogram will have two markers.

Move the markers in each chromatogram so that one marker is on the first peak and the other marker is on the last peak.

STEP 6Click the Align Chromatograms tool to align the chromatograms.

STEP 7Click the Compare Main Window tool to put the chromatograms in one window. They are now overlaid and aligned.

STEP 8An expanded view of the toolbar in the Compare window is provided.

It’s that easy!