RT journal article
T1 Fatty Acid and Tocopherol Composition of Pomace and Seed Oil from Five Grape Varieties Southern Spain
A1 Carmona Jiménez, Yolanda
A1 Igartuburu Chinchilla, José Manuel
A1 Guillén Sánchez, Dominico Antonio
A1 García Moreno, María de Valme
A2 Química Analítica
A2 Química Orgánica
K1 winery by-products
K1 vegetable oils
K1 vitamin E
K1 atherogenicity index (AI)
K1 thrombogenicity index (TI)
K1 ratio between hypo- and hypercholesterolemic fatty acids (H/H)
K1 vitamin E activity
AB Grape pomace and seeds are important winemaking by-products. Their oils are rich in bioactive compounds such as fatty acids and tocopherols. We have characterized oils from both by-products from five Spanish grape varieties (Palomino Fino, Pedro Ximenez, Muscat of Alexandria, Tempranillo and Tintilla de Rota). A high content of UFAs was found in all the analyzed samples. Grape pomace oils generally had the same oleic acid (PUFA(omega-6)) content as seed oils, and lower PUFA contents; they also had a markedly higher linolenic acid (PUFA(omega-3)) content, improving the PUFA(omega-6)/PUFA(omega-3) ratio. All the oil studied show good indicators of nutritional quality: low values of the atherogenicity (0.112-0.157 for pomace, 0.097-0.112 for seed) and thrombogenicity indices (0.30-0.35 for pomace, 0.28-0.31 for seed) and high values of the relationship between hypo- and hypercholesterolemic fatty acids (6.93-9.45 for pomace, 9.11-10.54 for seed). Three tocopherols were determined: alpha-, gamma- and delta-tocopherol. Pomace oils have higher relative contents of alpha- and delta-tocopherol, whereas seed oils have higher relative contents of gamma-tocopherol. A significantly higher content of total tocopherols has been found in pomace oil; it is higher in the oils from red varieties of pomace (628.2 and 706.6 mg/kg by-product), and in the oils from pomace containing stems (1686.4 mg/kg by-product). All the oils obtained can be considered as a source of vitamin E, and their consumption is beneficial for health.
PB MDPI
SN 1420-3049
YR 2022
FD 2022-10
LK http://hdl.handle.net/10498/28590
UL http://hdl.handle.net/10498/28590
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026