Research Article
Optimization of Extraction of Natural Pigment from Purple Sweet Potato by Response Surface Methodology and Its Stability
Table 2
Results of Box-Behnken of response surface methodology.
| Test code | | | | | (mg/g) |
| 1 | −1 | −1 | 0 | 0 | 11.3175 | 2 | −1 | 1 | 0 | 0 | 11.1425 | 3 | 1 | −1 | 0 | 0 | 11.3365 | 4 | 1 | 1 | 0 | 0 | 11.0685 | 5 | 0 | 0 | −1 | −1 | 11.9935 | 6 | 0 | 0 | −1 | 1 | 10.9165 | 7 | 0 | 0 | 1 | −1 | 11.5735 | 8 | 0 | 0 | 1 | 1 | 11.3900 | 9 | −1 | 0 | 0 | −1 | 11.8120 | 10 | −1 | 0 | 0 | 1 | 10.7630 | 11 | 1 | 0 | 0 | −1 | 11.1080 | 12 | 1 | 0 | 0 | 1 | 11.3585 | 13 | 0 | −1 | −1 | 0 | 11.3780 | 14 | 0 | −1 | 1 | 0 | 11.3700 | 15 | 0 | 1 | −1 | 0 | 11.4760 | 16 | 0 | 1 | 1 | 0 | 11.0735 | 17 | −1 | 0 | −1 | 0 | 11.3995 | 18 | −1 | 0 | 1 | 0 | 11.0815 | 19 | 1 | 0 | −1 | 0 | 10.8575 | 20 | 1 | 0 | 1 | 0 | 11.1065 | 21 | 0 | −1 | 0 | −1 | 11.6355 | 22 | 0 | −1 | 0 | 1 | 11.2575 | 23 | 0 | 1 | 0 | −1 | 11.7305 | 24 | 0 | 1 | 0 | 1 | 11.1630 | 25 | 0 | 0 | 0 | 0 | 12.4465 | 26 | 0 | 0 | 0 | 0 | 12.4800 | 27 | 0 | 0 | 0 | 0 | 12.4800 |
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