Table 1 Coded and un-coded values of independent variables and the responses of the dependent variables utilized in the face central composite design (FCCD) of the SCW extraction process
Run | Independent variables | Response | |||
|---|---|---|---|---|---|
R (solvent-to-fruit ratio, V/W) | t (time, min) | T (temperature, °C) | TPC (mg/g) | RSC (%) | |
1 | 0 (4.5) | 1 (75) | 0 (140) | 574.67 | 22.39 |
2 | 0 (4.5) | 0 (45) | 0 (140) | 563.67 | 31.16 |
3 | 0 (4.5) | 0 (45) | 0 (140) | 470.33 | 31.44 |
4 | − 1 (3) | 1 (75) | − 1 (110) | 298.67 | 28.98 |
5 | 1 (6) | 1 (75) | − 1 (110) | 476.33 | 32.65 |
6 | 0 (4.5) | 0 (45) | 0 (140) | 470.67 | 35.35 |
7 | 0 (4.5) | 0 (45) | 0 (140) | 499.8 | 32.03 |
8 | 1 (6) | 0 (45) | 0 (140) | 486.67 | 23.97 |
9 | 1 (6) | 1 (75) | 1 (170) | 999.9 | 48.63 |
10 | 1 (6) | − 1 (15) | − 1 (110) | 350.67 | 26.12 |
11 | 0 (4.5) | − 1 (15) | 0 (140) | 380.67 | 31.53 |
12 | 0 (4.5) | 0 (45) | 0 (140) | 506.67 | 34.79 |
13 | 0 (4.5) | 0 (45) | 1 (170) | 999 | 52.8 |
14 | 1 (6) | − 1 (15) | 1 (170) | 999 | 24.91 |
15 | − 1 (3) | − 1 (15) | − 1 (110) | 299.67 | 23.69 |
16 | − 1 (3) | 0 (45) | 0 (140) | 507.67 | 21.27 |
17 | − 1 (3) | 1 (75) | 1 (170) | 999.5 | 53.98 |
18 | − 1 (3) | − 1 (15) | 1 (170) | 967.67 | 25.19 |
19 | 0 (4.5) | 0 (45) | − 1 (110) | 318.67 | 29.66 |
20 | 0 (4.5) | 0 (45) | 0 (140) | 462.67 | 31.81 |