Table 4.
Experimental and predicted values of response variables at optimum extraction conditions.
| Response variables | Optimum extraction conditions | Maximum value | |||
|---|---|---|---|---|---|
| X 1 (%) | X 2 (W) | X 3 (min) | Experimental value | Predicted value | |
| TPC (mg·GAE/g) | 58 | 400 | 5 | 82.36 ± 1.05 | 83.90 |
| TFC (mg·QE/g) | 19.93 ± 2.50 | 21.84 | |||
| DPPH (%) | 73.61 ± 0.57 | 75.67 | |||
| ABTS (%) | 80.20 ± 3.23 | 82.66 | |||
X 1: ethanol concentration (%); X2: microwave power (W); X3: extraction time (min). Experimental results were expressed as average values ± standard deviation (n = 3).