Determination of Curcuma longa L. (Turmeric) Leaf Extraction Conditions Using Response Surface Methodology to Optimize Extraction Yield and Antioxidant Content

Figure 2

DPPH, H₂O₂, and ABTS radical-scavenging activity of the turmeric leaf extracts were measured to confirm the antioxidant effect of the turmeric leaf extracts. Turmeric leaves were extracted with different solvents to confirm the extracting solvent. The leaves were extracted with water and 10%, 30%, and 50% ethanol. The experiment data were measured in triplicates. The one-way ANOVA analysis was applied with Tukey’s post hoc analysis. Each data shown in this figure were expressed as mean ± SD in 95% significance. value <0.05.