UV impurity in the second dimension

The individual calculation steps are identical to the ones performed for the first dimension (see UV impurity check).

In the 1st dimension, UV spectra are compared to the apex spectrum of the same ¹D peak. To calculate the UV purity of a ²D peak, in contrast, the application evaluates all ²D peaks of a 2D peak.

The spectra of each ²D peak are compared to the apex spectrum of the highest ²D peak for the same 2D peak. In a first step, a match factor is calculated for each individual data point of the ²D peak. The average of these values is the UV Purity of the ²D peak. In a second step, the purity value for a 2D peak is calculated as the minimum purity value of all of its ²D peaks .

For a 2D peak to be considered as pure, all of its ²D peaks must be considered pure.