Bioactive compounds recovery optimization from vine pruning residues using conventional heating and microwave-assisted extraction methods

• Autor(a) principal: Jesus, Meirielly Santos
• Data de Publicação: 2019
• Outros Autores: Genisheva, Zlatina, Romani, Aloia Perez, Pereira, Ricardo Nuno Correia, Teixeira, J. A., Domingues, Lucília
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/59093
• topic: Vine pruning residue; Extraction; Polyphenols; Antioxidant; ABTS(PubChem CID: 90658258); Apigenin(PubChem CID: 5280443); Catechin(PubChem CID: 73160); Cinnamicacid (PubChem CID: 444539); DPPH(PubChem CID: 2735032); Ellagicacid (PubChem CID: 5281855); Ferulicacid (PubChem CID: 445858); Gallicacid (PubChem CID: 370); Iron(II)sulfate (PubChem CID: 24393); Iron(III)Cloride (PubChem CID: 24380); Narigenin(PubChem CID: 932); o-cumaricacid (PubChem CID: 637540); p-cumaricacid+epicatechin (PubChem CID: 637542); Quercetin(PubChem CID: 5280343); Resveratrol(PubChem CID: 445154); Rosmarinicacid (PubChem CID: 5281792); Rutin(PubChem CID: 5280805); Syringicacid (PubChem CID: 10742); TPTZ(PubChem CID: 77258); Trolox(PubChem CID: 40634); Vanillicacid (PubChem CID: 8468); Science & Technology

Polyphenol compounds from vine pruning residue (VPR) were extracted by conventional heating and microwave-assisted treatments. For each treatment, total phenolic compounds and their antioxidant activity were optimized by experimental design. Maximal extraction of polyphenolic compounds (2.17g/100g VPR) was obtained at 80°C, 120min and 45% of ethanol by conventional heating, and 2.37g/100g of VPR were extracted by microwave-assisted process at 120°C, 5min and 60% of ethanol. Ellagic acid and apigenin were the predominant polyphenolic compounds in the extracts, achieving concentration of 68.65 and 208.23mg/100g VPR, respectively for conventional heating and 185.15 and 118.84mg/100g of VPR for microwave-assisted treatment. The results showed reduction of extraction time and energy consumption for microwave-assisted treatment leading to cost-effective technology for the extraction of polyphenol compounds. Furthermore, the results hereby compiled allow for the tailor-made extraction of specific high-value compounds from a renewable biomass as vine pruning residue.