In this study, we used an oxygen radical absorbing capacity
(ORAC) assay to compare the antioxidant activities in the caryopsis
and endosperm of different strains of coloured rice, as well as between
cultivars of the same strain. We also examined total phenolic
content (with UV spectrophotometry) and anthocyanin content
(with high performance liquid chromatography) in the cultivars of
four rice strains, and identified the major anthocyanin pigments
present.