Metrohm Vision – Tutorial - Manual (Page 31)

 5 Quantitative Model Development
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 NIRS Vision Tutorial – Operation
Select a Product
1. Click on Mode Quantitative Analysis  Sample Selection.
2. Double click on the “xdsstart” project
3. Click and drag the product “HiPro” onto the red EQ and release the
mouse button.
4. In the Select Appropriate Constituent dialog constituent Protein is
listed. Enter:
 Unit %
5. Click on [OK]
6. In the Calibration Equation dialog box, click on [OK]
Notice Protein now appears under the red Eq and the cuvette is gray.
Perform Sample Selection
1. Click on Select  Apply Math.
2. In the Edit Sample Selection Parameters dialog box enter the
following settings:
 Selection Method Mahalanobis Distance in Principal Component
Space
 Math Treatment 2nd derivative
 Leave all other settings unchanged
3. Click on [OK].
4. In the Edit Math Properties dialog box in the Principal Components
ID Parameters tab set the following wavelength regions:
 Region 1
Minimum: 416
Maximum: 1080
 Region 2
Minimum: 1120
Maximum: 2484
 Cum Var. 95 %
 Click on [OK]
5. In the Sample Selection Options dialog box apply or confirm the
following settings:
 Find Outliers enabled
 Outlier Threshold 0.95
 Threshold Type Probability Level
 Find Redundant enabled
 By number of samples enabled