Metrohm Vision – Tutorial - Manual (Page 28)

1.6 Multilinear Regression 
NIRS Vision Tutorial – Operation 
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Save Results
1. Click on Select  Save Results.
2. If you are asked “Warning – By saving this calibration equation you
will invalidate the regression method which you previously
developed for this equation. You must develop the regression again
to use this equation. Do you want to continue?”, click on [YES].
3. If you are asked “Do you want to save redundant samples as
Validation Set?” Click on [YES].
1.6.2 Regression
Configure Regression Method
1. Click on Mode  Quantitative Analysis  Regression.
2. Double-click on the xdsstart project name.
3. Double-click on the MCC product
the tree expands to show all the products and their associated samples,
constituents, and equations when available.
4. Double-click on (f(x)) Equations under MCC.
5. Double-click on f(x) Caffeine
the name given for the equation turns light blue indicating that it has
been selected for Calibration Development.
6. Click on Regression  Edit Regression Method.
7. In the Edit Regression Method dialog box, enter the following:
 Regression Multilinear Regression
 Pre-Treatment Method 2nd derivative
 Leave all other settings unchanged
 Click on [OK].
8. In the Regression Treatment Properties dialog box, confirm the
following settings:
 Segment Size 10
 Gap 0
 Click on [OK].
Vision performs calculations according to parameters defined in preceding
steps.