Ultrasound-assisted extraction (UAE) of antioxidant phenolics from Corchorus olitorius leaves: a response surface optimization

Chemical and Biological Technologies in Agriculture

Table 2 Designed experiments and results for response surface analysis

Std	Ethanol (Conc., %, v/v)	Temperature (°C)	Time (min.)	Liquid–solid Ratio (mL/g)	TFC (mg QE/g)	TPC (mg GAE/g)
1	60	50	40	30	5.16	8.43
2	80	50	40	30	5.07	9.05
3	60	70	40	30	6.48	13.52
4	80	70	40	30	4.86	9.42
5	60	50	60	30	5.7	10.05
6	80	50	60	30	6.07	9.34
7	60	70	60	30	6.12	13.42
8	80	70	60	30	5.78	9.6
9	60	50	40	50	6.52	7.97
10	80	50	40	50	4.66	8.89
11	60	70	40	50	7.22	12.44
12	80	70	40	50	4.93	9.12
13	60	50	60	50	6.97	13.19
14	80	50	60	50	6.47	10.21
15	60	70	60	50	6.69	14.17
16	80	70	60	50	5.46	10.46
17	50	60	50	40	5.79	10.64
18	90	60	50	40	4.26	6.74
19	70	40	50	40	5.92	7.61
20	70	80	50	40	7.04	11.51
21	70	60	30	40	4.5	11.37
22	70	60	70	40	6.32	13.55
23	70	60	50	20	6.34	10.99
24	70	60	50	60	7.21	11.58
25	70	60	50	40	7.53	13.72
26	70	60	50	40	7.16	14.57
27	70	60	50	40	7.22	13.93
28	70	60	50	40	7.58	14.46
29	70	60	50	40	7.13	13.79
30	70	60	50	40	7.45	14.45