3.62 FAQ-296 How do I find the area under my curve?

Find-Area-under-Curve

Last Update: 2/4/2015

Plot your data (if you have not already) and make the graph window active, you can either use Integration gadget or Peak Analyzer.

For Integration gadget, go to Gadgets:Integrate... and click OK in the coming up dialog to bring up the yellow Region of Interest (ROI) box. Drag to position and resize the box to the area you want to calculate, then the Area and FWHM information will show up on the ROI top.

For Peak Analyzer, follow the steps below:

Choose Analysis: Peaks and Baseline: Peak Analyzer.

In the first page (the Goal page), select the Integrate Peaks radio button in the Goal group.

For nominal data with positive and negative peaks, step through the four steps in the dialog window: Baseline Mode, Subtract Baseline, Find Peaks and Integrate Peaks.

The resulting plot will label each peak with the x-coordinates.

The workbook containing results output shows the calculated result parameters for each peak, including peak areas, in the Integration_Resultn worksheet. The data for the integral curve can be found in the Integrated_Curve_Datan worksheet.