Table 4.
Experimental conditions both in uncoded and coded variables of the eleven runs carried out according to the central composite design (CCD).
| Run | Point Type a | Uncoded Variables b | Coded Variables b | ||
|---|---|---|---|---|---|
| ET (min) | MP (W/g) | ET | MP | ||
| 1 | F | 90 | 1 | −1 | −1 |
| 2 | F | 90 | 1.31 | −1 | 1 |
| 3 | F | 150 | 1 | 1 | −1 |
| 4 | F | 150 | 1.31 | 1 | 1 |
| 5 | A | 120 | 0.94 | 0 | −1.41421 |
| 6 | A | 120 | 1.37 | 0 | 1.41421 |
| 7 | A | 78 | 1.155 | −1.41421 | 0 |
| 8 | A | 162 | 1.155 | 1.41421 | 0 |
| 9 | C | 120 | 1.155 | 0 | 0 |
| 10 | C | 120 | 1.155 | 0 | 0 |
| 11 | C | 120 | 1.155 | 0 | 0 |
a This point type column defines whether a certain set of experimental conditions represents a factorial (F). axial (A) or central (C) point in the CCD experimental domain. b Abbreviations for coded and uncoded variables are: MP: microwave power; ET: extraction time.