Source | Sum of squares | Df | Mean square | F-value | Significant |
|
---|---|---|---|---|---|---|
Model | 20.16 | 9 | 2.24 | 10.82 | 0.0024 | |
X1 | 6.88 | 1 | 6.88 | 33.24 | 0.0007 | |
X2 | 2.97 | 1 | 2.97 | 14.36 | 0.0068 | ** |
X3 | 3.13 | 1 | 3.13 | 15.11 | 0.0060 | *** |
X1X2 | 0.26 | 1 | 0.26 | 1.26 | 0.2987 | ** |
X1X3 | 0.72 | 1 | 0.72 | 3.49 | 0.1038 | ** |
X2X3 | 0.15 | 1 | 0.15 | 0.71 | 0.4273 | * |
X12 | 2.53 | 1 | 2.53 | 12.23 | 0.0100 | * |
X22 | 1.77 | 1 | 1.77 | 8.53 | 0.0223 | |
X32 | 1.14 | 1 | 1.14 | 5.49 | 0.0516 | |
Residual | 1.45 | 7 | 0.21 | |||
Lack of fit | 0.79 | 3 | 0.26 | 1.58 | 0.3255 | Not significant |
Pure Error | 0.66 | |||||
Cor total | 21.61 | 4 | ||||
0.9329 | 16 | |||||
0.8467 |
Run | X1 | X2 | X3 | Extraction yield (mg · g−1) | |
---|---|---|---|---|---|
Experimental | Predicted | ||||
1 | −1 | −1 | 0 | 5.71 | 5.29 |
2 | 0 | 1 | 1 | 8.33 | 8.26 |
3 | 0 | 0 | 0 | 7.42 | 8.00 |
4 | 0 | 1 | −1 | 6.85 | 6.62 |
5 | 0 | −1 | −1 | 5.71 | 5.79 |
6 | 1 | −1 | 0 | 6.53 | 6.64 |
7 | 0 | 0 | 0 | 7.74 | 8.00 |
8 | 0 | 0 | 0 | 8.30 | 8.00 |
9 | 1 | 0 | −1 | 7.62 | 7.43 |
10 | −1 | 0 | −1 | 4.39 | 4.73 |
11 | 0 | 0 | 0 | 8.38 | 8.00 |
12 | 0 | −1 | 1 | 6.43 | 6.65 |
13 | −1 | 0 | 1 | 6.63 | 6.83 |
14 | −1 | 1 | 0 | 6.11 | 6.00 |
15 | 1 | 1 | 0 | 7.95 | 8.37 |
16 | 1 | 0 | 1 | 8.17 | 7.83 |
17 | 0 | 0 | 0 | 8.14 | 8.00 |
No. | Optimum conditions | Extraction yield (mg · g−1) | |||
---|---|---|---|---|---|
Solvent concentration (%) | Ultrasonic time (min) | Liquid-solid radio (mL · g−1) | Experimental | Predicted | |
1 | 76 | 55 | 22 | 8.79 | 8.62 |
2 | 76 | 55 | 22 | 8.28 | 8.62 |
3 | 76 | 55 | 22 | 8.39 | 8.62 |
4 | 76 | 55 | 22 | 8.56 | 8.62 |
5 | 76 | 55 | 22 | 8.93 | 8.62 |
Average | 8.59 | ||||
Ethanol leaching extraction | |||||
6 | 0 | 20 | 20 | 3.38 | |
7 | 0 | 20 | 20 | 3.28 | |
8 | 0 | 20 | 20 | 3.42 | |
Average | 3.36 |
Code | Solvent concentration (%) | Ultrasonic time (min) | Liquid-solid ratio (mL · g-1) |
---|---|---|---|
−1 | 60 | 30 | 15 |
0 | 70 | 45 | 20 |
1 | 80 | 60 | 25 |