In the present study the photodegradation process was monitored
simultaneously with two spectroscopic techniques – ultraviolet–visible
diode array (UV–vis-DAD) and 1
H-nuclear magnetic
resonance (1
H-NMR) – and interpreted by multiset analysis by
multivariate curve resolution-alternating least squares (MCR-ALS).
When MCR-ALS is applied to data matrices formed by the spectra
obtained during the degradation process, it is recovered a profile
in each order (concentration and spectra) for each component that
is sensible to detector