UV Purity

UV purity is defined by the main peak (DAD signal). Any impurities or peak areas that elute before the main peak are considered early eluting impurities. Conversely, peak areas that elute after the main peak are late eluting impurities.

This calculation is performed by as follows:

where
UV_Main	UV area of UV main peak
UV_imp	UV area of early eluting and late eluting impurities
UV_Total	Summed UV area of all peaks