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Fig. 3 | BMC Complementary and Alternative Medicine

Fig. 3

From: Infrared-assisted extraction followed by high performance liquid chromatography to determine angoroside C, cinnamic acid, and harpagoside content in Scrophularia ningpoensis

Fig. 3

Effects of the experiment parameters on extraction yield of angoroside C, cinnamic acid and harpagoside from S. ningpoensis in IRAE (n = 3). a Effects of solvent. Ratio of solid/liquid: 1:25; illumination time: 10 min; the distance: 3 cm. b Effects of solid/liquid ratio. Extraction solvent: 37.5% ethanol solution; illumination time: 10 min; the distance: 3 cm. c Effects of illumination time. Extraction solvent: 37.5% ethanol solution; Ratio of solid/liquid: 1:25; the distance: 3 cm. d Effects of distance between the IR lamp and glass flask. Extraction solvent: 37.5% ethanol solution; Ratio of solid/liquid: 1:25; illumination time: 10 min

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