Empower Tip: Calculating Amount/Concentration

Tip #281: Calibration Curve Fit Types: Cubic Fit

In this tip for Empower Chromatography Data System (CDS), we continue our series on Calculating Amount/Concentration, Calibration Curve fit types, and review Cubic Fit.

STEP 1

For a Cubic Fit, Empower performs a least-squares fit of a cubic polynomial to the calibration points. A minimum of four points is necessary and six points are recommended.

STEP 2

The Cubic Fit generates a Calibration Curve that is represented by the equation in figure 2.

STEP 3

Calibration Curves can be accessed in various ways, for example:

Review – bring a result into Review and click on the Calibration Curve tool

Compare – right click on a curve from the Curves tab in the project and select Compare

It’s that easy!

Final Notes

This can be done with either the Pro or QuickStart interface.

About the Author

Neil Lander

Neil provides internal support for Empower CDS software and is focused on developing laboratory software solutions that help organizations achieve their scientific and operational objectives.

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