Table 2.
Polyphenol components in lyophilized PP extracts obtained by ultrasonic extraction (UE), Soxhlet extraction (SE), and cold maceration (CM).
| Content (μg/g ± SD) | UE | SE | CM | |||
|---|---|---|---|---|---|---|
| MeOH | EtOH | Ace | Ace | Ace | ||
| Flavonoids | Catechin | 169.37 ± 5.45 | 78.14 ± 2.69 | 121.73 ± 2.11 | 60.84 ± 2.79 | 246.73 ± 4.83 |
| Epicatechin | 989.13 ± 16.02 | 350.74 ± 5.55 | 510.01 ± 14.79 | 1594.62 ± 69.77 | 433.64 ± 12.90 | |
| Hesperidin/Neohesperidin | 8.85 ± 0.95 | 22.34 ± 1.05 | 44.76 ± 1.98 | 11.20 ± 0.68 | 41.51 ± 2.11 | |
| Rutin | 9.34 ± 0.56 | 23.65 ± 1.71 | 54.39 ± 2.44 | 8.25 ± 1.15 | 87.02 ± 5.80 | |
| Phenolic acids | Caffeic acid | 16.25 ± 1.59 | 12.24 ± 2.55 | 28.44 ± 1.63 | 20.33 ± 1.89 | 18.21 ± 2.00 |
| Chlorogenic acid | 1.33 ± 0.02 | 2.03 ± 0.03 | 5.53 ± 0.05 | 8.41 ± 0.10 | 2.37 ± 0.02 | |
| Ellagic acid | 4585.77 ± 222.12 | 4798.66 ± 198.25 | 6883.41 ± 111.89 | 6377.43 ± 291.11 | 5601.08 ± 211.87 | |
| Gallic acid | 4256.04 ± 187.45 | 1652.95 ± 52.49 | 2656.32 ± 105.30 | 3396.03 ± 99.58 | 1018.71 ± 20.98 | |
| Total content of analyzed polyphenols | 10036.08 ± 434.16 | 6940.74 ± 264.32 | 10304.60 ± 240.19 | 11477.11 ± 467.07 | 7449.26 ± 260.51 | |
Results are expressed as μg of component/g of extract. All experiments were conducted in triplicates and results are reported as a mean ± SD.