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Orthogonal optimization of factors and levels for the extraction of STSP.
| Level | Factors |
|||
|---|---|---|---|---|
| A (g·mL−1) material liquid ratio | B (°C) Ultrasonic temperature | C (min) Ultrasonic time | D (W) ultrasonic power | |
| 1 | 1:20 | 55 | 45 | 250 |
| 2 | 1:30 | 65 | 55 | 300 |
| 3 | 1:40 | 75 | 65 | 350 |
