Table 6. ANOVA of the quadratic model for GC synthesis from the transesterification of DMC and enriched glycerol using the 5%Li/MCM-41 catalyst.
| Source | Sum of squares | Degree of freedom | Mean square | F-value | p-value | Remark |
|---|---|---|---|---|---|---|
| Model | 1317.11 | 14 | 94.08 | 40.54 | <0.0001 | Significant |
| A | 27.71 | 1 | 27.71 | 11.94 | 0.0035 | Significant |
| B | 174.69 | 1 | 174.69 | 75.28 | <0.0001 | Significant |
| C | 119.93 | 1 | 119.93 | 51.68 | <0.0001 | Significant |
| D | 65.97 | 1 | 65.97 | 28.43 | <0.0001 | Significant |
| AB | 78.46 | 1 | 78.46 | 33.81 | <0.0001 | Significant |
| AC | 0.2426 | 1 | 0.2426 | 0.1045 | 0.7509 | |
| AD | 2.04 | 1 | 2.04 | 0.8781 | 0.3636 | |
| BC | 211.78 | 1 | 211.78 | 91.26 | <0.0001 | Significant |
| BD | 6.75 | 1 | 6.75 | 2.91 | 0.1088 | |
| CD | 5.99 | 1 | 5.99 | 2.58 | 0.1290 | |
| A 2 | 103.24 | 1 | 103.24 | 44.49 | <0.0001 | Significant |
| B 2 | 214.77 | 1 | 214.77 | 181.74 | <0.0001 | Significant |
| C 2 | 249.35 | 1 | 249.35 | 107.45 | <0.0001 | Significant |
| D 2 | 32.44 | 1 | 32.44 | 13.98 | 0.0020 | Significant |
| Residual | 34.81 | 15 | 2.32 | |||
| Lack of fit | 29.69 | 10 | 2.97 | 2.90 | 0.1260 | Not significant |
| Pure error | 5.12 | 5 | 1.02 | |||
| Cor total | 1351.92 | 29 | ||||
| R 2 = 0.9743, adj R2 = 0.9502 |