This work describes the extraction of glycosylated flavonoids from ‘passion fruit’ leaves (Passiflora edulis; Passifloraceae), using carbon dioxide in the supercritical state modified with chloroform, ethyl acetate or short-chain alcohols. Carbon dioxide modified with 10% methanol was shown to be the best extraction fluid, considering both the yield of the flavonoid extracts and the temperature conditions. The supercritical fluid extracts were compared to those obtained by using a conventional extraction method for Passiflora flavanoids, indicating the advantages of supercritical fluid extraction as an alternative method for the analysis of flavonoids from other ‘passion fruit’ species (P. alata and P. incarnata).
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Moraes et al. (1997) studied this question.
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