Table 3.
Plackett–Burman experiment design with the independent variables.
| Run | Factors | Extraction Yield (Yi, mg/g) * | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| X1 | X2 | X3 | X4 | X5 | Salidroside (Y1) |
Tyrosol (Y2) |
Rosavin (Y3) |
Rosin (Y4) |
Cinnamyl Alcohol (Y5) |
Sum (Y6) |
|
| 1 | +1 | +1 | +1 | +1 | +1 | 7.40 ± 0.06 | 0.25 ± 0,03 | 8.22 ± 0.07 | 0.72 ± 0.01 | 0.029 ± 0.002 | 16.62 ± 0.13 |
| 2 | −1 | −1 | +1 | +1 | +1 | 7.80 ± 0.14 | 0.25 ± 0.01 | 8.65 ± 0.30 | 0.81 ± 0.01 | 0.040 ± 0.000 | 17.55 ± 0.45 |
| 3 | −1 | +1 | +1 | −1 | −1 | 3.64 ± 0.32 | 0.17 ± 0.02 | 5.81 ± 0.12 | 0.44 ± 0.01 | 0.026 ± 0.001 | 10.07 ± 0.20 |
| 4 | +1 | −1 | +1 | −1 | −1 | 2.04 ± 0.06 | 0.10 ± 0.01 | 2.37 ± 0.12 | 0.19 ± 0.01 | 0.019 ± 0.001 | 4.71 ± 0.07 |
| 5 | +1 | +1 | −1 | −1 | +1 | 4.23 ± 0.01 | 0.13 ± 0.00 | 4.63 ± 0.01 | 0.43 ± 0.01 | 0.061 ± 0.001 | 9.47 ± 0.03 |
| 6 | −1 | −1 | −1 | −1 | +1 | 6.31 ± 0.00 | 0.11 ± 0.00 | 7.26 ± 0.01 | 0.70 ± 0.00 | 0.095 ± 0.007 | 14.47 ± 0.03 |
| 7 | −1 | +1 | −1 | +1 | −1 | 7.17 ± 0.08 | 0.29 ± 0.01 | 8.46 ± 0.01 | 0.64 ± 0.02 | 0.028 ± 0.004 | 16.57 ± 0.11 |
| 8 | +1 | −1 | −1 | +1 | −1 | 3.75 ± 0.07 | 0.15 ± 0.02 | 3.11 ± 0.14 | 0.26 ± 0.01 | 0.00 ± 0.00 | 7.26 ± 0.21 |
X1: particle size; X2: extraction time; X3: extraction temperature; X4: extraction modulus; X5: molar water content; * Mean ± SD.