Table 1. The extraction condition of carotenoid using Box-Behnken experimental design and carotenoid content of persimmon peel peel extract
| No. | Extraction temperature (°C, X1) | Extraction time (min, X2) | Oil/sample (mL/g, X3) | Carotenoid content (mg/100 g oil) |
| Coded | Actual | Coded | Actual | Coded | Actual |
| 1 | -1 | 20 | -1 | 10 | 0 | 16 | 0.36 |
| 2 | 1 | 80 | -1 | 10 | 0 | 16 | 0.70 |
| 3 | -1 | 20 | 1 | 50 | 0 | 16 | 0.54 |
| 4 | 1 | 80 | 1 | 50 | 0 | 16 | 1.05 |
| 5 | -1 | 20 | 0 | 30 | -1 | 2 | 1.46 |
| 6 | 1 | 80 | 0 | 30 | -1 | 2 | 6.10 |
| 7 | -1 | 20 | 0 | 30 | 1 | 30 | 0.24 |
| 8 | 1 | 80 | 0 | 30 | 1 | 30 | 0.51 |
| 9 | 0 | 50 | -1 | 10 | -1 | 2 | 2.62 |
| 10 | 0 | 50 | 1 | 50 | -1 | 2 | 3.87 |
| 11 | 0 | 50 | -1 | 10 | 1 | 30 | 0.30 |
| 12 | 0 | 50 | 1 | 50 | 1 | 30 | 0.48 |
| 13 | 0 | 50 | 0 | 30 | 0 | 16 | 0.73 |
| 14 | 0 | 50 | 0 | 30 | 0 | 16 | 0.64 |
| 15 | 0 | 50 | 0 | 30 | 0 | 16 | 0.79 |