Table 5.
Experiment confirmation of predicted value at optimal extraction condition.
| Optimal levels |
Anthocyanin yield (mg/100 g) | |||||
|---|---|---|---|---|---|---|
| Y predicted | Experimental value | Mean* | Relative errora (%) | |||
| 1 | 2 | 3 | ||||
| Acidified methanolic extraction | 1345.320 | 1297.503 | 1437.774 | 1303.348 | 1346.208 | 0.066 |
| X 1 = 60°C | ||||||
| X 2 = 120 min | ||||||
| X 3 = 0.5 g : 23.1 mL | ||||||
| Acidified ethanolic extraction | 869.290 | 878.355 | 886.060 | 878.355 | 880.923 | 1.321 |
| X 1 = 60°C | ||||||
| X 2 = 86.89 min | ||||||
| X 3 = 0.5 g : 35 mL | ||||||
aRelative error (%) = [(experimental value − predicted value)/experimental value] × 100%.
Mean is average value from triplicate of experimental run.