Metrohm Vision – Tutorial - Manual (Page 29)

 5 Quantitative Model Development
22
 NIRS Vision Tutorial – Operation
Save Equation
1. Click on Regression  Save Equation
2. Click on [OK]
Results
Figure 6 Result Multi Linear Regression
1 Correlation and
Sensitivity 2 Statistical results
3 Statistical results
with statistical summary
Color code In the Correlation and Sensitivity view
 Black or brown:
Correlation: The correlation coefficient for spectral value versus
constituent value
 Orange
Sensitivity: The slope for constituent value versus spectral value
 Red
Spectra of the sample with the highest entered constituent value
 Light blue
Spectra of the sample with the lowest entered constituent value.
Wavelength Selection Criteria
To select the optimum wavelength, select a wavelength that is high in
correlation and low in sensitivity, and where the spectra of high and low
constituent values are far apart.