Natural deep eutectic solvents and ultrasound-assisted extraction: Green approaches for extraction of wine lees anthocyanins

作者：Bosiljkov, Tomislau; Dujmic, Filip; Bubalo, Marina Cujetko; Hribar, Janez; Vidrih, Rajko; Brncic, Mladen; Zlatic, Emil; Redovnikavic, Ivana Radojclc; Jokic, Stela

来源：Food and Bioproducts Processing, 2017, 102: 195-203.

DOI：10.1016/j.fbp.2016.12.005

• Anthocyanins
• Natural deep eutectic solvent
• Response surface methodology
• Ultrasound-assisted extraction
• Wine less
• Eco-friendly extraction

To establish environmentally friendly extraction methods for the anthocyanins in wine lees, natural deep eutectic solvents (NADES) were investigated as a green alternative to conventional solvents, coupled with high-efficiency ultrasound-assisted extraction. Screening for the optimal NADES for this extraction was initially performed. A choline-chloride-based NADES with malic acid as the hydrogen bond donor was selected as the most promising, which provided more effective extraction of wine lees anthocyanins compared to a conventional solvent. To optimise this extraction of wine lees anthocyanins using the NADES and ultrasound-assisted extraction, response surface methodology was successfully applied. Considering the maximum amount of extracted compounds, the optimal conditions were: extraction time, 30.6 min; ultrasound power, 341.5 W; and water content in NADES, 35.4% (w/w). This approach using NADES as a green solvent and ultrasound as an alternative energy source represents a good choice for designing eco-friendly extraction methods for phenolic compounds from various sources.

• 出版日期2017-3