RT journal article
T1 Optimizing and Comparing Ultrasound- and Microwave-Assisted Extraction Methods Applied to the Extraction of Antioxidant Capsinoids in Peppers
A1 Vázquez Espinosa, Mercedes
A1 Velasco González de Peredo, Ana
A1 Ferreiro González, Marta
A1 García Barroso, Carmelo
A1 Palma Lovillo, Miguel
A1 Fernández Barbero, Gerardo
A1 Espada Bellido, Estrella
A2 Química Analítica
K1 agri-food analysis
K1 antioxidant compounds
K1 capsaicinoids
K1 capsinoids
K1 microwave-assisted extraction (MAE)
K1 multivariate analysis
K1 peppers
K1 ultrasound-assisted extraction (UAE)
AB Capsinoids are very similar antioxidant compounds to capsaicinoids, but less irritating,non-pungent and more palatable, and can thus be used in greater concentrations for food applications.To date, three capsinoids (capsiate, dihydrocapsiate, and nordihydrocapsiate) have been isolatedfrom the pepper fruits. Due to its substantial commercial importance, it would be convenient todetermine which pepper varieties have a richer content. Ultrasound- (UAE) and microwave- (MAE)assisted extraction have been implemented and analyzed using multivariate statistical methods.Firstly, di erent solvents were tested individually. The three best solvents were used in a set mixturedesign, where 42% methanol and 58% ethyl acetate were determined as the optimum combination forUAE, and 100% methanol for MAE. Subsequently, a Box–Behnken experimental design with fourvariables for both UAE and MAE (time, temperature, pH and sample mass:solvent volume “ratio”)was performed. The sample mass:solvent volume was the most influential variable in UAE; while forMAE no variable was any more influential than the others. Finally, both optimized extraction methodswere successfully applied to di erent varieties of peppers. Besides, to demonstrate the e ciency ofboth extraction methods, a recovery study was performed. The results prove the potential of bothtechniques as highly adequate methods for the extraction of capsinoids from peppers.
PB MDPI
SN 2073-4395
YR 2019
FD 2019-10
LK http://hdl.handle.net/10498/21978
UL http://hdl.handle.net/10498/21978
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026