Table 3.
Coefficients of polynomial equations for the quadratic model and their statistical parameters
| Coefficient code | Coefficient estimate for response variables | |||||
|---|---|---|---|---|---|---|
| Theoretical Plate | Retention time | Peak area | Resolution 1 | Resolution 2 | ||
| β0 | 9425.89 | 5.49 | 2.38 | 1.48 | 4.77 | |
| β1 | -1046.75 | -1.64 | -0.5021 | 0.1921 | -0.6485 | |
| β2 | 134.42 | -0.0834 | 0.1181 | -0.1671 | -0.645 | |
| β3 | -1867.08 | -1.19 | -0.3983 | -0.0842 | 0.2673 | |
| β4 | 111.25 | 0.0645 | -0.1058 | 0.5233 | 0.2838 | |
| β5 | 216.92 | 0.3197 | 0.0737 | -0.2867 | -0.2067 | |
| β6 | -228.92 | 0.0147 | -0.087 | 0.0267 | -0.3162 | |
| β7 | 228.93 | 0.5697 | 0.0273 | 1.15 | -2.26 | |
| β8 | -492.9 | 0.0243 | -0.3782 | -0.2336 | -0.9942 | |
| β9 | 721.76 | 0.2244 | -0.1462 | 0.3547 | -0.4888 | |
| Adjusted R2 | 0.9382 | 0.9979 | 0.9001 | 0.9499 | 0.9848 | |
| p value | 0.0013 | < 0.00001 | 0.0041 | 0.0008 | < 0.0001 | |