Triphase dynamic extraction system involved with ionic liquid and deep eutectic solvent for various bioactive constituents from Tartary buckwheat simultaneously

Abstract

Friendly and highly efficient acquisition of multiple active components from foods is always of great interest. For synchronous extraction and separation flavonoids together with oil from Tartary buckwheat, a new triphase dynamic system was developed with magnetic nanofluid based on deep eutectic solvent (N888-Cl/lauric acid, 1:2) (liquid phase 1), ionic liquid ([C4mim]Br) aqueous solution (liquid phase 2) and raw material powders (solid phase). It was the first time that two types of green solvents were simultaneously applied and assisted by magnetic separation. Through the investigation on key properties and operational conditions of this system, the extraction efficiency of oil and flavonoids in liquid phase 1 and 2 was achieved as 35.29 and 41.17 mg/g respectively, which were higher than that of conventional ways. Then kinetic and thermodynamics mechanisms were discovered comprehensively. After targeted recovery, the spectral characterization and antioxidant activity of two products proved the effectiveness of the developed method.