Desenvolvimento e aplicação de métodos analíticos verdes para a extração de flavonoides a partir de resíduos de Passiflora edulis sims f. Flavicarpa Deg.
Resumen
The concepts developed in this dissertation were guided by biorefinery assumptions, in which
residues such as food peels can be enriched. In this sense, this research had as its main
objective to develop, validate and apply green methods for the extraction of flavonoids from
the peel of Passiflora edulis Sims (yellow passion fruit), which is here taken as study matrix
due to its antioxidant activity, among other pharmacological effects. The three studied
analytical methods comprised the extraction with solvent using ultra-turrax, ultrasound and
microwave equipment, from which three flavonoids could be extracted: orientin, isoorientin
and isovitexin, which were determined by UPLC-PDA. The green character of each method
was analysed by means of the Green Star metric which, allied to analytical criteria, made it
possible to find the best procedure for removing the flavonoids of interest in the samples. It is
important to emphasize that UPLC and the application of chemometrics are associated to the
choice of solvents and other ideally innocuous and renewable materials could also contribute
to increase the green character of the whole study. At the end of this work, it was observed
that, among the evaluated extraction methods, the most efficient and green-characterized
experiment was based on ultra-turrax (exp.8), which made it possible to extract the selected
flavonoids in greater quantity from the residues of sour passion fruit.
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