Optimal Extraction of Gallic Acid from Suaeda glauca Bge. Leaves and Enhanced Efficiency by Ionic Liquids

Table 1

Design and results by RSM for gallic acid extraction from Suaeda glauca Bge. leaves.

Number				EE of gallic acid (mg·g^−1)
	Temperature (°C)	Liquid-solid ratio (mL·g^−1)	Extraction time (min)	Actual value	Predicted value
1	30	10	50	5.19	5.32
2	70	10	50	5.60	5.52
3	30	30	50	5.34	5.42
4	70	30	50	5.30	5.17
5	30	20	30	5.75	5.61
6	70	20	30	5.87	5.95
7	30	20	70	5.78	5.70
8	70	20	70	5.18	5.32
9	50	10	30	5.66	5.67
10	50	30	30	5.73	5.8
11	50	10	70	5.71	5.65
12	50	30	70	5.26	5.26
13	50	20	50	6.44	6.21
14	50	20	50	6.16	6.21
15	50	20	50	6.15	6.21
16	50	20	50	6.28	6.21
17	50	20	50	6.04	6.21