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Orientador(es)
Resumo(s)
Purpose To study the composition of extracts of Ginja cherries stems and leaves obtained after extraction using different solvents and to evaluate their antioxidant activities. Stems and leaves are by-products of the Ginjinha cherry liquor production; extracting valuable compounds with the most appropriate solvent would valorise these wastes. Method The extraction was performed using different solvents (acetone, ethanol, methanol, ethyl acetate, water, 2-propanol); liquid chromatography-electro spray ionization-mass spectrometry (LC-ESI/MS) was utilized to identify the predominant phenolic acids and flavonoids present in the resulting extracts. The Total Phenolic Content was determined with the Folin-Ciocolteau method. The antioxidant activity was also tested using the ABTS? essay. Results Stems extracts showed a higher concentration in polyphenols than those from leaves. The solvent affected remarkably the extracts compositions: considering the polyphenols content ethanol and water gave the best results for stems and leaves, respectively. A good correlation was established between the antioxidant activity of the extracts and their polyphenolic composition.
Descrição
Palavras-chave
Cherry by-products High added-value compounds extraction Polyphenols Antioxidant activity
Contexto Educativo
Citação
DEMIRAY, S... [et al.] - Extraction of valuable compounds from Ginja Cherry by-products: effect of the solvent and antioxidant properties. Waste and Biomass Valorization. ISSN 1877-265X. Vol. 2, n.º 4 (2011), p. 365-371
Editora
Springer