Table 5. Kinetic parameters of carotenoid degradation in sweet potato peel extract and encapsulated extract during 60 days of storage under ambient light and dark conditions.
| Sample | y | R2 | k/day-1 | t1/2/day |
|---|---|---|---|---|
| Light condition | ||||
| SPP extract | 4.7338-0.0622x | 0.88 | 0.0622 | 11.14 |
| SDE | 4.5882-0.0149x | 0.84 | 0.0149 | 46.52 |
| FDE | 4.6679-0.0438x | 0.90 | 0.0438 | 15.83 |
| Dark condition | ||||
| SPP extract | 4.7519-0.0141x | 0.76 | 0.0014 | 49.50 |
| SDE | 4.6349-0.0106x | 0.87 | 0.0106 | 65.39 |
| FDE | 4.687-0.0125x | 0.75 | 0.0125 | 55.45 |
SPP=sweet potato pee, SDE=spray dried encapsulates, FDE=freeze dried encapsulates, R2= linear correlation coefficient, k=rate constant, t1/2=half-life time. Data present mean value of three replicates±S.D.