Table 3.
The profiles of phenolic compounds of extracts was obtained by two different methods
| Rt (min) | SFE | SWE | Compound (%) |
|---|---|---|---|
| 6.5 | 0.02 | 6.7 | Protocatechuic |
| 9.2 | 11.9 | 20.8 | p-Hydroxybenzoic |
| 12.3 | 11.5 | 1.27 | p-Hydroxybenzaldehyde |
| 16.2 | 4.13 | 5.61 | Vanillic |
| 16.9 | 21.6 | 2.32 | Caffeic |
| 17.11 | 0.03 | 0.06 | Syringic |
| 17.3 | 8.02 | 1.7 | Trans-p-Coumaric |
| 19.2 | 7.82 | 3.27 | Ferulic |
| 20.4 | 0.04 | 3.85 | Trans-Sinapic |
| – | 65.06 | 45.58 | Total phenolic |
Note Pumpkin peel extract obtained by supercritical fluid extraction (SFE) and subcritical water extraction (SWE)