Table 1.
Analytical parameters of HPLC–FLD-ESI-MS method.
| Compounds | Retention Time (min) | [M-H]− | In Source Fragment (m/z) |
|---|---|---|---|
| Monomers (DP1) | 6.7 | 289 | 245 |
| Dimers (DP2) | 18.2 | 577 | 425, 289 |
| Galloylated dimers (DP2-G) | 25 | 729 | 303 |
| Trimers (DP3) | 28.1 | 865 | 739, 713 |
| Galloylated trimers (DP3-G) | 30.4 | 881, 1017 | 593, 303 |
| Tetramers (DP4) | 35.3 | 1153 c | 865 |
| Galloylated tetramers (DP4-G) | 36.8 | 1305 | - |
| Pentamers (DP5) | 41.2 | 1441, 797, 873 | - |
| Hexamers (DP6) | 45.2 | - | - |
| Heptamers (DP7) | 49 | - | - |
| Octamers (DP8) | 52.2 | - | - |
| Nonamers (DP9) | 55.0 | - | - |
| Decamers (DP10) | 57.8 | - | - |
| Undecamers (DP11) | 60.1 | - | - |
| Dodecamers (DP12) | 62.0 | - | - |
| Polymers | 65.7 | - | - |