Micellar extraction of lipophilic metabolites from turmeric

This work aimed to optimize the micellar extraction of bioactive compounds from turmeric, using sodium oleate as surfactant. Response surface methodology was employed, considering the independent variables: mass ratio of turmeric/micellar solution (MS) of sodium oleate (MSSO), surfactant concentration and extraction time (tE). The turmeric/MSSO ratio and surfactant mainly affected the process. The optimal conditions were as follows: turmeric/MSSO = 0.01, surfactant = 1.525% and tE = 6.6 min; and the dependent variables: TPC = 181.6 ± 3.0 mg gallic acid equivalent/g turmeric dry basis (db); DPPH• = 50.6 ± 1.1 mg Trolox equivalent (TE)/g turmeric db; ABTS•+ = 142.7 ± 7.9 mg TE/g turmeric db; curcumin = 11.6 mg/g turmeric db. Micellar extraction is a sustainable, economical, and simple process compared to the conventional ethanol method. .