User`s guide

68 User’s Guide
2
nd
Derivative displayed with original trace
Add two traces
To add two traces to a chromatogram window,
1. In the chromatogram window, do a right mouse click,
and select Operations followed by Add.
2. Click on 1st trace to select the first file by clicking the
mouse on the chromatogram.
3. Click on the 2
nd
trace to select the trace to be added to
the first by clicking on the trace with the mouse. The
result trace will appear in the window. Note that in
order for this operation to be valid, both traces must
have the same sampling frequency.
Subtract two chromatograms
To subtract two traces,
1. In the chromatogram window, do a right mouse click
and then select Operations followed by Subtract.
2. At the prompt, click on the 1st trace. Select the first
trace by clicking the mouse on the chromatogram.
3. Select the trace to be subtracted from the first by
clicking on the trace with the mouse. The result trace
will appear in the window.