Research Article
Optimization of Extraction of Natural Pigment from Purple Sweet Potato by Response Surface Methodology and Its Stability
Table 3
Analysis of variance of regression model.
| | Source | DF | SS | MS | | Pr > |
| | 1 | 0.15436 | 0.15436 | 3.509213 | 0.085582 | | 1 | 0.13696 | 0.13696 | 3.113648 | 0.103052 | | 1 | 0.060492 | 0.060492 | 1.375222 | 0.263671 | | 1 | 3.009007 | 3.009007 | 68.40659 | 0.0001 | | 1 | 11.8412 | 11.8412 | 269.1971 | 0.0001 | | 1 | 0.008649 | 0.008649 | 0.196626 | 0.665347 | | 1 | 0.321489 | 0.321489 | 7.308713 | 0.019186 | | 1 | 1.6887 | 1.6887 | 38.39082 | 0.0001 | | 1 | 6.344287 | 6.344287 | 144.2307 | 0.0001 | | 1 | 0.15563 | 0.15563 | 3.538089 | 0.084454 | | 1 | 0.03591 | 0.03591 | 0.816382 | 0.38402 | | 1 | 7.349762 | 7.349762 | 167.0891 | 0.0001 | | 1 | 0.798342 | 0.798342 | 18.14947 | 0.001107 | | 1 | 4.344434 | 4.344434 | 98.76612 | 0.0001 | | Model | 14 | 22.27012 | 1.590723 | 36.16341 | 0.0001 | | Error | 12 | 0.527845 | 0.043987 | | | | Total | 26 | 22.79797 | | | |
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= 97.68% = 94.68%.
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