Fig. 3

Effect of mesh sieve that A. rugosa passing through. Effect of mesh sieve that A. rugosa passing through on the extraction yield of two target analytes, with 0.8 mol/L [BMIM]Br, solid–liquid ratio 1:20 (g/mL), 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 powder