Table 2.
ANOVA for the quadratic equations of Design Expert 12.0.1 for MAE of TPC and NC in grapefruit leaf and statistical indicators for each response
| Source | Sum of squares | df | Mean Square | F value | P-valueProb > F |
|---|---|---|---|---|---|
| Model (TPC) | 406.78 | 9 | 45.2 | 44.84 | < 0.0001 |
| X1-Microwave power density | 108.30 | 1 | 108.30 | 107.44 | < 0.0001 |
| X2-Solid/solvent ratio | 139.18 | 1 | 139.18 | 138.06 | < 0.0001 |
| X3-Extraction time | 84.43 | 1 | 84.43 | 83.76 | < 0.0001 |
| X1X2 | 9.93 | 1 | 9.93 | 9.86 | 0.0105 |
| X1X3 | 22.68 | 1 | 22.68 | 22.50 | 0.0008 |
| X12 | 6.46 | 1 | 6.46 | 6.41 | 0.0298 |
| X22 | 15.75 | 1 | 15.75 | 15.63 | 0.0027 |
| X32 | 20.74 | 1 | 20.74 | 20.57 | 0.0011 |
| Residual | 10.08 | 10 | 1.01 | ||
| Lack of fit | 8.41 | 5 | 1.68 | 5.05 | 0.0500 |
| Pure error | 1.67 | 5 | 0.3331 | ||
| Cor total | 416.86 | 19 | |||
| Model (NC) | 127.18 | 9 | 14.13 | 170.78 | < 0.0001 |
| X1-Microwave power density | 3.77 | 1 | 3.77 | 45.56 | < 0.0001 |
| X2-Solid/solvent ratio | 26.57 | 1 | 26.57 | 321.08 | < 0.0001 |
| X3-Extraction time | 48.49 | 1 | 48.49 | 585.97 | < 0.0001 |
| X1X2 | 0.95 | 1 | 0.9522 | 11.51 | 0.0069 |
| X1X3 | 2.74 | 1 | 2.74 | 33.09 | 0.0002 |
| X2X3 | 7.57 | 1 | 7.57 | 91.43 | < 0.0001 |
| X12 | 0.0657 | 1 | 0.0657 | 0.7937 | 0.3939 |
| X22 | 0.5958 | 1 | 0.5958 | 7.20 | 0.0230 |
| X32 | 17.40 | 1 | 17.40 | 210.28 | < 0.0001 |
| Residual | 0.8275 | 10 | 0.0827 | ||
| Lack of Fit | 0.5964 | 5 | 0.1139 | 2.21 | 0.2028 |
| Pure Error | 0.2581 | 5 | 0.0516 | ||
| Cor Total | 128.01 | 19 |
| Responses | Standart deviation | R2 | Adj R2 | Pred R2 | Variance coefficient | Adeq. precisior |
|---|---|---|---|---|---|---|
| TPC (mg GAEg−1-DL) | 1.00 | 0.9758 | 0.9541 | 0.7995 | 8.45 | 27.97 |
| NC (mg Ng−1-DL) | 0.28 | 0.9935 | 0.9877 | 0.9548 | 3.55 | 46.82 |