TABLE 6.
Response variables | Optimum extraction conditions | Maximum values | |||
---|---|---|---|---|---|
Sonication time (min) | Sonication temperature (°C) | Stirring speed (rpm) | Predicted | Actual | |
Yield of extract (%) | 70 | 61.8 | 1000 | 38.30 | 38.14 |
DPPH scavenging activity (%) | 70 | 56.2 | 515 | 90.63 | 90.35 |
TPC (mg GAE /100 g DW PPE) | 70 | 62.2 | 1000 | 282.92 | 283.18 |
Abbreviations: DPPH, 2,2‐diphenyl‐1‐picrylhydrazyl; DW, dry weight; GAE, gallic acid equivalent; PPE, pomegranate peel extract; TPC, total phenolic content.