RT info:eu-repo/semantics/article
T1 Microwave pretreatment for the extraction of anthocyanins from saffron flowers: Assessment of product quality
A1 Álvarez Martín, Ana
A1 Terreros Calvo, Sara
A1 Cocero Alonso, María José
A1 Mato Chaín, Rafael Bartolomé
K1 Azafrán - Cultivo y producción
K1 Antioxidantes
K1 Microwaves
K1 Microondas
K1 Polyphenols
K1 Polifenoles
K1 Color
K1 Saffron flowers
K1 Kinetic analysis
AB The potential of saffron flowers as a source of polyphenols, and in particular anthocyanins, for the extraction of bioactive compounds and the production of a cyanic colorant was analyzed. A microwave pretreatment, prior to the conventional solid–liquid extraction process, was proposed as a feasible intensification step. The effectiveness of microwave pretreatment was assessed in terms of increased yield and improved quality of the final product. The operational variables studied were the pretreatment temperature (60–120 °C) and the solid–liquid ratio (0.30–0.50 g/mL). It was found that the addition of the microwave pretreatment to the conventional process allowed one to reduce extraction time by up to 12 times and to greatly improve the characteristics of the final product, using microwave energy densities as low as 0.16–0.54 kJ/mL. The extract quality was evaluated in terms of polyphenol richness (25% increase), product composition (80% of the anthocyanins was delphinidin), antioxidant capacity (boosted by the pretreatment) and color (variations in red and blue hue depending on conditions). To conclude, a microwave pretreatment in which the material is heated to a temperature of 65 °C with a solvent ratio of 0.30 g/mL was selected as the optimum to maximize process efficiency and product quality.
PB MDPI
SN 2076-3921
YR 2021
FD 2021
LK https://uvadoc.uva.es/handle/10324/59336
UL https://uvadoc.uva.es/handle/10324/59336
LA eng
NO Antioxidants, 2021, Vol. 10, Nº. 7, 1054
NO Producción Científica
DS UVaDOC
RD 08-jun-2024