Analyzing the Peak Purity Visual Check of Iso Line Plot
The visual check of the Iso line plot is a method that allows peak purity evaluation. High peak purity is indicated by:
All recognizable absorption maxima are located vertically below one another in direction of the wavelength axis.
The maxima are separated so that the surrounding iso lines do not touch (no overlapping).
Pure peaks have (local) symmetry or an idealized ellipse shape in the maximum.