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

Figure 1

Total phenolic compound and flavonoid content of the turmeric leaf extracts were measured to identify antioxidant content of the turmeric leaf extracts. Turmeric leaves were extracted with different solvents to confirm the extracting solvent for the optimal antioxidant content. The extraction solvents were water and 10%, 30%, and 50% ethanol. The experimental 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.