The levels of carotenoids, anthocyanins, phenolic compounds and ascorbic acid were determined using a Shimadzu HPLC equipped with quaternary pumps (model LC-20AD), a DAD detector (Shimadzu, model SPD-M20A), a degasser unit (DGU-20A5), and a Rheodyne injection valve with a 20lL loop. The equipment was also connected in series to a mass spectrometer Amazon Speed from Bruker Daltonics with an ion-trap analyzer (MSn) and APCI (atmospheric pressure chemical ionization) and ESI (electrospray ionization) sources.