RT journal article
T1 Development of Optimized Ultrasound-Assisted Extraction Methods for the Recovery of Total Phenolic Compounds and Anthocyanins from Onion Bulbs
A1 Velasco González de Peredo, Ana
A1 Vázquez Espinosa, Mercedes
A1 Espada Bellido, Estrella
A1 Ferreiro González, Marta
A1 Carrera Fernández, Ceferino Adrián
A1 Fernández Barbero, Gerardo
A1 Palma Lovillo, Miguel
A2 Química Analítica
K1 Allium cepa L.
K1 anthocyanins
K1 Box–Behnken
K1 onion
K1 phenolic compounds
K1 UHPLC
K1 ultrasound-assisted extraction
AB Allium cepa L. is one of the most abundant vegetable crops worldwide. In addition to its versatile culinary uses, onion also exhibits quite interesting medicinal uses. Bulbs have a high content of bioactive compounds that are beneficial for human health. This study intends to develop and optimize two appropriate ultrasound-assisted methods for the extraction of the phenolic compounds and anthocyanins present in red onion. A response surface methodology was employed and, specifically, a Box-Behnken design, for the optimization of the methods. The optimal conditions for the extraction of the phenolic compounds were the follows: 53% MeOH as solvent, pH 2.6, 60 & DEG;C temperature, 30.1% amplitude, 0.43 s cycle, and 0.2:11 g sample/mL solvent ratio. On the other hand, the optimal conditions for the anthocyanins were as follows: 57% MeOH as solvent, pH 2, 60 & DEG;C temperature, 90% amplitude, 0.64 s cycle, and 0.2:15 g sample/mL solvent ratio. Both methods presented high repeatability and intermediate precision, as well as short extraction times with good recovery yields. These results illustrate that the use of ultrasound-assisted extraction, when properly optimized, is suitable for the extraction and quantification of the compounds of interest to determine and improve the quality of the raw material and its subproducts for consumers.
PB MDPI
SN 2076-3921
YR 2021
FD 2021-11
LK http://hdl.handle.net/10498/26107
UL http://hdl.handle.net/10498/26107
LA eng
NO This work has been supported by the project "EQC2018-005135-P" (Equipment for liquid chromatography using mass spectrometry and ion chromatography), of the State Subprogram of Research Infrastructures and Technical Scientific Equipment. This research was funded by the University of Cadiz, by the INIA (National Institute for Agronomic Research), and FEDER (European Regional Development Fund, within the framework of the Operational Programme under the Investment for Growth 2014-2020) who provided financial support (Project RTA2014-00083-C03-03), and by the Ministry of Science and Innovation of Spain (FPU grant AP-2018-03811 to Ana Velasco Gonzalez de Peredo).
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026