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Título: | Evolution of Hydroxytyrosol, Hydroxytyrosol 4-β-d-Glucoside, 3,4-Dihydroxyphenylglycol and Tyrosol in Olive Oil Solid Waste or "Alperujo" |
Autor: | Fernández-Prior, África CSIC ORCID; Bermúdez-Oria, Alejandra CSIC ORCID; Fernández-Bolaños Guzmán, Juan CSIC ORCID ; Espejo-Calvo, Juan Antonio; López-Maestro, Francisco; Rodríguez-Gutiérrez, Guillermo CSIC ORCID | Palabras clave: | Antioxidants 3,4-dihydroxyphenylglycol Hydroxytyrosol Natural extracts Olive oil by-products Tyrosol |
Fecha de publicación: | 1-dic-2022 | Editor: | Multidisciplinary Digital Publishing Institute | Citación: | Molecules 27 (23): 8380 (2022) | Resumen: | The main by-product generated from the olive oil two-phase extraction system, or alperujo, is undoubtedly a rich source of bioactive components, among which phenolics are one of the most important. The evolution of four of its main phenolics: hydroxytyrosol (HT), hydroxytyrosol 4-β-d-glucoside (Glu-HT), 3,4-dihydroxyphenylglycol (DHPG) and tyrosol (Ty) was studied over two seasons and in ten oil mills under similar climatological and agronomic conditions, for the first time using organic extraction and high-performance liquid chromatography (HPLC-DAD) determination. The results show that HT (200-1600 mg/kg of fresh alperujo) and Ty (10-570 mg/kg) increase, while DHPG (10-370 mg/kg) decreases only in the last month of the season and Glu-HT (1400-0 mg/kg) decreases drastically from the beginning. This evolution is similar between different seasons, with a high correlation between Glu-HT, HT, and Ty. On the other hand, it has been verified that a mixture of alperujos from all the oil mills, which is what the pomace extractor receives, is a viable source of a liquid fraction which is rich in the phenolics studied through organic extractions and especially after the application of a thermal treatment, obtaining values of 4.2 g/L of HT, 0.36 g/L of DHPG, and 0.49 g/L of Ty in the final concentrated liquid fraction. | Descripción: | 13 Páginas.-- 6 Figuras.-- 2 Tablas | Versión del editor: | http://dx.doi.org/10.3390/molecules27238380 | URI: | http://hdl.handle.net/10261/286691 | DOI: | 10.3390/molecules27238380 | E-ISSN: | 1420-3049 |
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molecules_2022_27_08380.pdf | Artículo principal | 2,53 MB | Adobe PDF | Visualizar/Abrir |
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