Table 2. Experimental design matrix to screen important variables for extraction yields of AG and DHQ.

Run	Factor A	Factor B	Factor C	Response Y1	Response Y2
	Extraction time (min)	Ultrasound power (W)	Solid-liquid ratio (g/mL)	Extraction yield of DHQ (mg/g)	Extraction yield of AG (mg/g)
1	40	250	1∶18	36.1	163.4
2	50	150	1∶16	34.2	154.3
3	50	250	1∶20	36.9	183.2
4	60	200	1∶20	37.1	185.4
5	40	200	1∶20	36.3	169.5
6	60	250	1∶18	36.6	179.7
7	40	200	1∶16	36.2	161.7
8	50	200	1∶18	36.7	183.4
9	50	200	1∶18	36.8	183.2
10	50	150	1∶20	35.6	158.3
11	60	150	1∶18	35.1	160.2
12	40	150	1∶18	34.5	156.8
13	50	200	1∶18	36.7	183.8
14	50	200	1∶18	36.9	183.5
15	50	200	1∶18	36.7	183.1
16	60	200	1∶16	36.0	163.3
17	50	250	1∶16	36.5	176.7