Ultrasound-Assisted Extraction of Phenolic Compounds from Moroccan Lavandula stoechas L.: Optimization Using Response Surface Methodology

Table 2

Different combinations generated by the Box–Behnken design and the recorded responses for each experiment of L. stoechas extracts.

Experiment number	Extraction time (min)	Liquid/solid ratio (ml/g)	Ethanol concentration (%)	Yield (%)	TPC (mg GAE/g)
1	20	20	60	12.33	180.82
2	40	20	60	7.00	144.13
3	20	30	60	15.33	184.36
4	40	30	60	21.03	115.63
5	20	25	40	22.71	149.53
6	40	25	40	26.60	147.48
7	20	25	80	16.60	124.57
8	40	25	80	19.53	108.37
9	30	20	40	14.19	130.53
10	30	30	40	29.93	149.53
11	30	20	80	18.80	118.80
12	30	30	80	21.40	95.52
13	30	25	60	22.33	89.38
14	30	25	60	20.80	95.33
15	30	25	60	21.73	90.87