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Optimization and Comparison of Ultrasound and Microwave-Assisted Extraction of Phenolic Compounds from Cotton-Lavender (Santolina chamaecyparissus L.)

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URI: http://hdl.handle.net/10498/24518

DOI: 10.3390/agronomy11010084

ISSN: 2073-4395

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2021_108.pdf (1.340Mb)
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Author/s
Aourach, Mohammed; Velasco González de Peredo, Ana; Vázquez Espinosa, Mercedes; Essalmani, Haiat; Palma Lovillo, Miguel; Fernández Barbero, Gerardo
Date
2021-01
Department
Química Analítica
Source
Agronomy 2021, 11(1), 84;
Abstract
The interest in natural phenolic compounds has increased because of their attractive use especially as antioxidant and antimicrobial agents in foods. The large content in phenolic compounds of interest in Santolina chamaecyparissus L. (S. chamaecyparissus) makes this plant a target source that is worthy of note. In this work, new extraction technologies comprising ultrasound (UAE) and microwave (MAE) assisted extraction of the phenolic compounds in S. chamaecyparissus have been developed, optimized, and compared. Several extraction factors have been optimized based on a Box-Behnken design. Such optimized factors include the percentage of methanol in water (25-75%), the temperature (10-70 degrees C), the ultrasound amplitude (20-80%), the ultrasound cycle (0.2-1 s), the solvent pH (2-7) and the solvent-sample ratio (5/0.2-15/0.2 mL/g) with regard to UAE, while the percentage of methanol in water (50-100%), the temperature (50-100 degrees C), the pH (2-7) and the solvent-sample ratio (5/0.2-15/0.2 mL/g) were optimized for MAE. The solvent composition was the most influential parameter both on MAEs (64%) and UAEs (74%). The extraction optimum time was established as 15 min for MAE and 25 min for UAE. Five major phenolic compounds were detected and identified by Ultra-High-Performance Liquid Chromatography-Quadrupole Time of Flight-Mass Spectrometry (UHPLC-QToF-MS) in the extracts: chlorogenic acid, quercetin 3-O-galactoside, quercetin 3-O-glucoside, isoorientin, and cynarin. With the exception of chlorogenic acid, the other four compounds have been identified for the first time in S. chamaecyparissus. The findings have confirmed that MAE is a significantly more efficient extraction method than UAE to extract phenolic compounds from S. chamaecyparissus.
Subjects
cotton-lavender; Santolina chamaecyparissus L; ultrasound-assisted extraction; microwave-assisted extraction; Box-Behnken design; phenolic compounds; UHPLC-QToF-MS
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Atribución 4.0 Internacional
This work is under a Creative Commons License Atribución 4.0 Internacional

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