Checks

It is the definition of the tests that are applied to the selected step and wavelength, e.g. which region of interest should be at which 𝑅ꜰ.

Each definition has the following fields:

• Start 𝑅ꜰ: start of the 𝑅ꜰ range

• End 𝑅ꜰ: end of the 𝑅ꜰ range

• Relative deviation: define or disable the maximum allowed relative deviation of each sample track compared to the reference track

• Logical operator: define the logic applied to the test (combine the relative and the absolute deviation with a OR or a AND operator)

• Absolute deviation: define or disable the maximum allowed absolute deviation of each sample track compared to the reference track

• Color: the color used in the main Data View to materialize the portions in sample tracks where the deviation exceeds the given values

• Status: the state of the check (see Check computation)

  • Failed

  • Passed

  • Not computed: resolve any error and click on the Check button (all the steps used in the impurity test definition should already be executed)

• Description: free text field

Important

Definition errors appear in the row header, and the Check button is disabled. For example, only one reference should be defined per check. All other tracks on reference side should be dragged and dropped to the sample side.

Toolbar

• Add a check definition

• Delete the currently selected check definition

• Generate profiles for all track (from image data)

  Note

  • Deletes all output data (peaks, assignments, calibration functions and results) for evaluations based on a TLC Visualizer step

  • Only available if the current analysis does not contain any locked evaluation based on a TLC Visualizer step

• Compute all checks (see Check computation)

Check computation

When the Check button is clicked, the system computes the Status for each check in the table.

For each check, visionCATS processes the samples linked to the selected Step/Illumination in the overview. It compares each value (AU) within the defined 𝑅ꜰ range against the corresponding reference value.

The comparison is performed on AU values determined by generating track profiles with default integration options (Bounds [0;1], Smoothing Savitzky Golay with Window at 7, Baseline Lower slope).

A comparison passes if the sample point matches the reference point within the defined limits of ± Absolute deviation OR / AND ± Relative deviation (in %).

Note

You can choose to apply only the absolute deviation, only the relative deviation, or a combination of both using the AND or OR operator.

The check Status will be marked as Passed only if all sample points pass their respective comparisons.