Flavonoids in Different Parts of Lysimachia clethroides Duby Extracted by Ionic Liquid: Analysis by HPLC and Antioxidant Activity Assay

Figure 7

Effect of ultrasound time on extraction yields. Type of IL: [BMIM]BF₄; concentration: 0.5 mol⋅L⁻¹; the particle size: 24 mesh (a) and 40 mesh (b); solid-liquid ratio: 1 : 10 g⋅mL⁻¹ (a) and 1 : 20 g⋅mL⁻¹ (b); ultrasound power: 500 W; centrifugation speed: 5000 r⋅min⁻¹.

(a)

(b)