Metrohm Vision – Tutorial - Manual (Page 19)

 4 Qualitative Model Development
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 NIRS Vision Tutorial – Operation
Include other Products
1. Repeat the Sample Selection Process for all the products in the xdsstart
project.
1.3 Developing an Identification method
An Identification Method is required to differentiate products which differ in
chemical and/or physical properties.
Develop an Identification Method
1. Click on Mode  Qualitative Analysis  Identify Method
Development
2. File  Library  Open, select the library xdslib
3. Click on Identify  Apply Math.
4. In the Edit Identify Method dialog box, set the following:
 Method Correlation in Wavelength Space
 Pre Treatment Method 2nd derivative
 Region 1
Minimum: 416
Maximum: 1080
 Region 2
Minimum: 1120
Maximum: 2484
 Threshold type = Match value; value = 0.95
 Identify Acceptance Set enabled
 Identify Rejection Set disabled
 Click on [OK]
5. In the Edit Math Properties dialog box in the Wavelength Regions tab
set the following wavelength regions:
 Region 1
Minimum: 416
Maximum: 1080
 Region 2
Minimum: 1100
Maximum: 2484
 Click on [OK]
6. In the Edit Math Properties dialog box in the 2 nd Derivative tab set the
following parameters:
 Segment: 10
 Gap: 0