Figure 2From: Carotenoids, total polyphenols and antioxidant activity of grapes (Vitis vinifera) cultivated in organic and conventional systemsHPLC-PDA chromatogram of carotenoids separated from fresh skin grapes (Muscat Hamburg variety-organic). Four carotenoids were identified: (1) neoxanthin, (2) violaxanthin, (3) lutein and (4) ß-carotene.Back to article page