Table 1 The names, retention time, area, and concentrations of Polyphenol compounds of PE.
No. | Compound | Retention time (min) | Area | Area (%) | Concentration (µg/mL) |
|---|---|---|---|---|---|
1 | Gallic acid | 3.39 | 52.02 | 0.359 | 4.35 |
2 | Chlorogenic acid | 4.22 | 703.59 | 4.857 | 96.92 |
3 | Catechin | 4.60 | 0.00 | 0.00 | 0.00 |
4 | Methyl gallate | 5.67 | 105.75 | 0.730 | 5.92 |
5 | Caffeic acid | 6.03 | 1097.84 | 7.578 | 90.28 |
6 | Syringic acid | 6.36 | 68.44 | 0.472 | 4.98 |
7 | Pyro catechol | 6.82 | 12.69 | 0.087 | 1.88 |
8 | Rutin | 7.77 | 6.94 | 0.047 | 0.82 |
9 | Ellagic acid | 8.45 | 10.50 | 0.072 | 2.36 |
10 | Coumaric acid | 9.11 | 596.94 | 4.120 | 18.08 |
11 | Vanillin | 9.74 | 16.10 | 0.111 | 0.71 |
12 | Ferulic acid | 10.23 | 326.96 | 2.257 | 22.07 |
13 | Naringenin | 10.57 | 363.67 | 2.510 | 43.64 |
14 | Daidzein | 12.31 | 1087.63 | 7.508 | 67.89 |
15 | Quercetin | 12.68 | 181.25 | 1.251 | 21.14 |
16 | Cinnamic acid | 14.03 | 384.07 | 2.651 | 7.39 |
17 | Apigenin | 14.44 | 864.36 | 5.967 | 66.59 |
18 | Kaempferol | 14.92 | 235.33 | 1.624 | 18.11 |
19 | Hesperetin | 15.55 | 3098.45 | 21.38 | 183.73 |
