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Flavonoids are among the most important plant metabolites. Due to their potential benefits, there is a considerable interest in this natural product. In genus Citrus , some plants have not yet been much exploited in Brazil, as in the case of grapefruit ( Citrus maxima ), whose main flavonoids are naringin and their aglycone naringenin. The physico-chemical characteristics are important pre-requisites of reference chemical in future studies. In this context, the objective of this study was to determine the characterization of naringin and naringenin by melting point, DSC, UV-VIS, 1 H and 13 C NMR, IR and MS. Results revealed that, naringin and naringenin after characterization, can be used as a chemical of reference in future studies and contribute to seeking possible technological applications.

STUDY OF FLAVONOIDS PRESENT IN POMELO (Citrus Maxima) BY DSC, UV-VIS, IR, 1H AND 13C NMR AND MS