Novel lactic acid-based natural deep eutectic solvents: Efficiency in the ultrasound-assisted extraction of antioxidant polyphenols from common native Greek medicinal plants

Selected native Greek medicinal plants, including dittany, fennel, marjoram, mint and sage, were used to test the efficiency of some novel lactic acid-based natural deep eutectic solvents (NADES) to extract polyphenolic compounds. Extractions were performed under ultrasonication and the eutectic mixtures, tested as 80% (v/v) aqueous solutions, were lactic acid:choline chloride, lactic acid:sodium acetate, lactic acid:ammonium acetate and lactic...