Fig. 5From: Analysis of tilianin and acacetin in Agastache rugosa by high-performance liquid chromatography with ionic liquids-ultrasound based extractionEffect of solid–liquid ratio. Effect of solid–liquid ratio on the extraction yield of two target analytes, with A. rugosa powder of passing through 90-mesh sieve, 0.8 M [BMIM]Br, ultrasonic for 30 min. The extraction yield was expressed as the observed values of target analytes (mg/g), the content of tilianin and acacetin per gram of A. rugosa powderBack to article page