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Non-Thermal Ultrasonic Extraction of Polyphenolic Compounds from Red Wine Lees.

Non-Thermal Ultrasonic Extraction of Polyphenolic Compounds from Red Wine Lees.

Authors :
Dujmić F
Kovačević Ganić K
Ćurić D
Karlović S
Bosiljkov T
Ježek D
Vidrih R
Hribar J
Zlatić E
Prusina T
Khubber S
Barba FJ
Brnčić M
Source :
Foods (Basel, Switzerland) [Foods] 2020 Apr 09; Vol. 9 (4). Date of Electronic Publication: 2020 Apr 09.
Publication Year :
2020

Abstract

This study presents the results of conventional aqueous (CE) and non-conventional ultrasound-assisted (UAE) extractions of polyphenolic compounds from lees extracts of red wine varieties (Merlot and Vranac). The effect of ultrasound extraction time (t, s), and amplitude (A,%) from a 400 W ultrasound processor with different ultrasonic probes diameters (Ds, mm) on the amount and profile of polyphenolic compounds in the obtained extracts was investigated and compared to CE. The optimal conditions resulting in maximum extraction of phenolic compounds were: Probe diameter of 22 mm, amplitude 90% and extraction time for Vranac wine lees 1500 s and for Merlot wine lees extraction time of 1361 s. UAE proved to be significantly more effective in enhancing the extraction capacity of trans-resveratrol glucoside (30.57% to 300%), trans-resveratrol (36.36% to 45.75%), quercetin (39.94% to 43.83%), kaempferol (65.13% to 72.73%), petunidin-3-glucoside (41.53% to 64.95%), malvidin-3-glucoside (47.63% to 89.17%), malvidin-3-(6-O-acetyl) glucoside (23.84% to 49.74%), and malvidin-3-(6-O-p-coumaroyl) glucoside (26.77% to 34.93%) as compared to CE. Ultrasound reduced the extraction time (2.5-fold) and showed an increase of antioxidant potential by 76.39% (DPPH) and 125.83% (FRAP) compared to CE.<br />Competing Interests: Authors declare no conflict of interest.

Details

Language :
English
ISSN :
2304-8158
Volume :
9
Issue :
4
Database :
MEDLINE
Journal :
Foods (Basel, Switzerland)
Publication Type :
Academic Journal
Accession number :
32283874
Full Text :
https://doi.org/10.3390/foods9040472