Research Article
Optimization of Variables for Aqueous Extraction of Gum from Grewia mollis Powder
Table 1
Matrices of the face-centered central design for the independent variables (experimental and coded levels).
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Number run | Factors | Responses variables | Time (H) | pH | Temperature (°C) | Ratio | Viscosity (Pa·s) | Gum yield |
| 1 | (+1) 3 | (−1) 4 | (−1) 25 | (+1) 80 | 0.4339 | 0.6226 | 2 | (−1) 1 | (−1) 4 | (+1) 85 | (+1) 80 | 0.2551 | 0.8174 | 3 | (−1) 1 | (+1) 10 | (+1) 85 | (−1) 10 | 0 | 0 | 4 | (−1) 1 | (−1) 4 | (−1) 25 | (−1) 10 | 0 | 0 | 5 | (0) 2 | (−1) 4 | (0) 55 | (0) 45 | 0.3119 | 0.3248 | 6 | (0) 2 | (+1) 10 | (0) 55 | (0) 45 | 0.3481 | 0.2438 | 7 | (0) 2 | (0) 7 | (0) 55 | (0) 45 | 0.8363 | 0.231 | 8 | (0) 2 | (0) 7 | (+1) 85 | (0) 45 | 0.3085 | 0.227 | 9 | (0) 2 | (0) 7 | (0) 55 | (0) 45 | 1.023 | 0.945 | 10 | (0) 2 | (0) 7 | (0) 55 | (0) 45 | 1.1 | 0.409 | 11 | (+1) 3 | (+1) 10 | (−1) 25 | (+1) 80 | 0.543 | 0.5436 | 12 | (+1) 3 | (+1) 10 | (−1) 25 | (−1) 10 | 0 | 0 | 13 | (0) 2 | (0) 7 | (0) 55 | (0) 45 | 0.834 | 0.285 | 14 | (+1) 3 | (+1) 10 | (+1) 85 | (−1) 10 | 0 | 0 | 15 | (−1) 1 | (+1) 10 | (+1) 85 | (+1) 80 | 0.3931 | 0.2006 | 16 | (+1) 3 | (+1) 10 | (+1) 85 | (+1) 80 | 0.3107 | 0.3014 | 17 | (+1) 3 | (−1) 4 | (+1) 85 | (−1) 10 | 0 | 0 | 18 | (0) 2 | (0) 7 | (0) 55 | (−1) 10 | 0 | 0 | 19 | (−1) 1 | (−1) 10 | (−1) 25 | (−1) 10 | 0 | 0 | 20 | (+1) 3 | (0) 7 | (0) 55 | (0) 45 | 0.6979 | 0.177 | 21 | (−1) 1 | (0) 7 | (−1) 25 | (0) 45 | 1.214 | 0.285 | 22 | (−1) 1 | (+1) 10 | (−1) 25 | (+1) 80 | 0.8223 | 0.1608 | 23 | (0) 2 | (0) 7 | (0) 55 | (+1) 80 | 0.4639 | 0.092 | 24 | (−1) 1 | (−1) 10 | (−1) 25 | (+1) 80 | 0.4084 | 0.3346 | 25 | (+1) 3 | (−1) 4 | (−1) 25 | (−1) 10 | 0 | 0 | 26 | (0) 2 | (0) 7 | (0) 55 | (0) 45 | 0.5126 | 0.187 | 27 | (−1) 1 | (−1) 10 | (+1) 85 | (−1) 10 | 0 | 0 | 28 | (0) 2 | (0) 7 | (−1) 25 | (0) 45 | 0.4045 | 0.272 | 29 | (+1) 3 | (+1) 10 | (+1) 85 | (+1) 80 | 0.2885 | 0.5906 | 30 | (0) 2 | (0) 7 | (0) 55 | (0) 45 | 1.333 | 0.343 |
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