Table 3.
Polyphenol components in lyophilized PP extracts obtained by supercritical fluid extraction (SFE) using CO2 and EtOH as co-solvent at different pressures and temperature of 40 °C.
| Content (μg/g ± SD) | SFE | ||||
|---|---|---|---|---|---|
| 10 MPa | 15 MPa | 20 MPa | 25 MPa | ||
| Flavonoids | Catechin | 312.39 ± 10.52 | 366.57 ± 9.85 | 121.07 ± 6.87 | 138.33 ± 7.56 |
| Epicatechin | 618.56 ± 20.85 | 688.27 ± 19.25 | 718.75 ± 5.85 | 561.73 ± 11.59 | |
| Hesperidin/Neohesperidin | 9.13 ± 0.09 | 11.71 ± 0.50 | 62.02 ± 1.36 | 48.88 ± 2.10 | |
| Rutin | 8.90 ± 0.05 | 55.51 ± 1.23 | 87.85 ± 2.25 | 66.91 ± 2.81 | |
| Phenolic acids | Caffeic acid | 12.29 ± 0.19 | 10.76 ± 0.20 | 34.60 ± 0.59 | 16.41 ± 1.20 |
| Chlorogenic acid | 3.06 ± 0.03 | 3.61 ± 0.03 | 12.92 ± 0.05 | 3.39 ± 0.03 | |
| Ellagic acid | 4518.16 ± 157.36 | 4679.24 ± 209.85 | 7492.53 ± 345.25 | 4844.81 ± 221.58 | |
| Gallic acid | 1501.49 ± 100.90 | 1467.13 ± 59.36 | 3032.11 ± 128.47 | 1150.95 ± 62.58 | |
| Total content of analyzed polyphenols | 6983.99 ± 289.99 | 7282.80 ± 300.27 | 11561.84 ± 490.69 | 6831.41 ± 309.45 | |
Results are expressed as μg of component/g of extract. All experiments were conducted in triplicates and results are reported as a mean ± SD.