Table 3.
The optimization criteria of the maximum total flavonoid content and the results of model validation.
| Name | Goal | Lower Limit | Upper Limit | Lower Weight | Upper Weight |
|---|---|---|---|---|---|
| A: Ultrasound time (min) | is in range | 40 | 60 | 1 | 1 |
| B: Ethanol concentration (%) | is in range | 40 | 60 | 1 | 1 |
| C: SDS content (%) | is in range | 1.5 | 2.5 | 1 | 1 |
| D: Liquid material ratio (v/w) | is in range | 15 | 25 | 1 | 1 |
| Total flavonoids content (%) | maximize | 1.33502 | 100 | 1 | 1 |
| Category | Ultrasound time (min) | Ethanol concentration (%) | SDS content (%) | Liquid material ratio (v/w) | Total flavonoids content (%) |
| Predicted value | 51.84 | 48.68 | 1.88 | 19.81:1 | 2.13 ± 0.008a |
| Experimental value | 52 | 48.7 | 1.9 | 20:1 | 2.10 ± 0.017a |
Note: The little letters “a” means that there is no significant difference between the predicted value and the experimental value of the total flavonoid content at p < 0.05.