Effect of acoustic frequency and power density on the aqueous ultrasonic-assisted extraction of grape pomace (Vitis vinifera L.) - A response surface approach

Aqueous ultrasound-assisted extraction (UAE) of grape pomace was investigated by Response Surface Methodology (RSM) to evaluate the effect of acoustic frequency (40, 80, 120kHz), ultrasonic power density (50, 100, 150W/L) and extraction time (5, 15, 25min) on total phenolics, total flavonols and ant...

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Bibliographic Details
Published in:Ultrasonics sonochemistry 2014-11, Vol.21 (6), p.2176-2184
Main Authors: GONZALEZ-CENTENO, María Reyes, KNOERZER, Kai, SABAREZ, Henry, SIMAL, Susana, ROSSELLO, Carmen, FEMENIA, Antoni
Format: Article
Language:English
Subjects:
Antioxidants - isolation & purification
Chemical Fractionation - methods
Chemistry
Exact sciences and technology
Flavonols - isolation & purification
General and physical chemistry
Models, Theoretical
Phenols - isolation & purification
Physical chemistry of induced reactions (with radiations, particles and ultrasonics)
Solvents - chemistry
Sonication - methods
Time Factors
Ultrasonic chemistry
Vitis - chemistry
Water - chemistry
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Summary:Aqueous ultrasound-assisted extraction (UAE) of grape pomace was investigated by Response Surface Methodology (RSM) to evaluate the effect of acoustic frequency (40, 80, 120kHz), ultrasonic power density (50, 100, 150W/L) and extraction time (5, 15, 25min) on total phenolics, total flavonols and antioxidant capacity. All the process variables showed a significant effect on the aqueous UAE of grape pomace (p
ISSN:1350-4177
1873-2828
DOI:10.1016/j.ultsonch.2014.01.021