Table 1.
The orthogonal test of four factors at three different levels
| Factors | A duration of extraction (hour) | B maceration time(min) | C extract-solvent ratio(times) | D number of extraction(times) |
|---|---|---|---|---|
| 1 | 1 | 20 | 10 | 1 |
| 2 | 1.5 | 40 | 15 | 2 |
| 3 | 2 | 60 | 20 | 3 |
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