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  • Title: Extraction of curcumin from turmeric residue (Curcuma longa L.) using deep eutectic solvents and surfactant solvents.
    Author: Le NT, Hoang NT, Van VTT, Nguyen TPD, Chau NHT, Le NTN, Le HBT, Phung HT, Nguyen HT, Nguyen HM.
    Journal: Anal Methods; 2022 Feb 24; 14(8):850-858. PubMed ID: 35166283.
    Abstract:
    Using waste materials to extract biologically active ingredients with green solvents is a new trend for sustainable development. Herein, different types of deep eutectic solvents (DESs) and surfactant solvents (SSs) were used to extract curcumin from turmeric residues (TRs), among which choline chloride-propylene glycol (ChCl-Pro) showed the highest yield. The optimized extraction conditions included a ChCl : Pro ratio of 1 : 2, water content in the DESs of 20%, solid : liquid ratio of 1 : 40 maintained for 60 min at 50 °C, and a TR particle size of 0.18 mm. The extraction yield was 54.2 mg g-1, which was 1.31 times higher than when methanol was used as a solvent. Distilled water was used to recover curcumin from the DES extract with a recovery yield of 99.7%. Furthermore, the antioxidant and acetylcholinesterase (AChE) inhibitory activities of the recovered curcumin were evaluated, with IC50 values of 25.58 ± 0.51 and 19.12 ± 0.83 μg mL-1, respectively. This study highlights the promising potential of using green solvents to extract bioactive compounds from waste materials.
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