Results

The Result Table of the chromatogram with the PDA part of the method is enhanced by the following columns: PDA Peak Purity, PDA Name Match, PDA Best Match Name and PDA Best Match. It is possible to change the order of the columns or hide some of them using the Edit - Setup Columns... command.

Result Table with the PDA data

PDA Peak Purity

Displays the PDA Peak Purity value of the peak. In case the Peak Purity is calculated using the Five points method (as described in the chapter "Method Setup - PDA Method") and the Absorbance Threshold is set too high to be over peak inflexion points, Error result is displayed with a tooltip hinting for solution.

The Peak Purity calculation uses Pearson correlation coefficient formulas to calculate the similarity of any peak spectra to apex spectrum, results are re-scaled to 0-1000 scale and averaged (five results averaged in case of Five points setting, all spectra similarity results averaged in case of All points setting).

PDA Name Match

Displays the match factor of the spectrum that was found in the first used spectral library based on the name of the peak gained from the Calibration Summary Table.

PDA Best Match Name

Displays the name of the spectrum found according to the method library search options. If there are more libraries specified in the PDA method (Chromatogram - Measurement Conditions - PDA), the PDA Best Match Name will search all libraries. The library name is displayed as a tool tip over the Result Table cell.

PDA Best Match

Displays the match factor of the compound from the PDA Best Match Name column.