Metrohm Vision Manual - Manual (Page 115)

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Wavelength correlation is an example of another wavelength method. During the analysis, the
dot product is calculated between the identified spectrum and the mean spectrum of the
library product. The sample is qualified when the value is higher than the threshold for the
product. The default value of the threshold is 0.9.
4.6.3 Qualification Method Development Procedure
Preparation
1. From the main menu, select Mode/Qualitative Analysis/Qualify Method Development to enter
the qualification development program.
2. Open the combo box and select the library for which you want to create methods.
Define the qualification parameters
1. Expand the library tree by clicking on the plus next to the library name. Double click the
product for which you want to develop a qualification method. When selected, the product
icon will turn gray.
2. From the menu choose Select/Apply Math.
• In the Edit Qualify Method dialog box, configure the following parameters:
• From the Method list, choose the method.
• From the Pretreatment Method list, choose the desired math pretreatment methods.
You can choose multiple methods; they will be applied in the order of choice.
• In the Wavelength box, specify the overall wavelength range.
• in the Threshold box, declare the preferred type of threshold (match value or
probability, when appropriate). Optionally edit the threshold value.
• When wavelength maximum distance is chosen as the qualification method, the