To this end, 30 μL of water diluted samples (1:5 for the aqueous extract or 1:10 for the powdered samples) were mixed with 1 mL of a 0.1 mM DPPH in methanol. The mixture was vortexed and left to stand at room temperature in darkness (40 min) before reading the absorbance at 517 nm. The results were expressed as mg Trolox equivalents per g of extract solids (mg TE/g extract solids) by using the corresponding calibration curve for Trolox.