Table 2. Proanthocyanidin characteristics in single ion monitoring (SIM), including retention time and molecular ion in positive mode.
| Composition | Sub-class | Retention time (min) | Mode | Molecular Ion (m/z) |
|---|---|---|---|---|
| GGC_I | Proanthocyanidins | 4.7 | Pos | 899.7 |
| GC_I | Proanthocyanidins | 4.9 | Pos | 595.6 |
| GGGC_I | Proanthocyanidins | 5 | Pos | 1204.8 |
| GGG | Proanthocyanidins | 5.3 | Pos | 915.6 |
| GGC_II | Proanthocyanidins | 5.4 | Pos | 899.7 |
| GCC_I | Proanthocyanidins | 5.5 | Pos | 883.7 |
| CC-gallate | Proanthocyanidins | 5.5 | Pos | 731.7 |
| GGGC_II | Proanthocyanidins | 5.6 | Pos | 1204.8 |
| GGCC_I | Proanthocyanidins | 5.6 | Pos | 1187.8 |
| GGC_III | Proanthocyanidins | 5.7 | Pos | 899.7 |
| GGGCC_I | Proanthocyanidins | 5.7 | Pos | 1492.2 |
| GC_II | Proanthocyanidins | 5.9 | Pos | 595.6 |
| GGCC_II | Proanthocyanidins | 6.2 | Pos | 1187.8 |
| GCCC_I | Proanthocyanidins | 6.3 | Pos | 1171.8 |
| GGGC_III | Proanthocyanidins | 6.3 | Pos | 1204.8 |
| GCC_II | Proanthocyanidins | 6.4 | Pos | 883.7 |
| GCC_III | Proanthocyanidins | 6.5 | Pos | 883.7 |
| ±-Catechin-2,3,4-13C3 | IS | 6.6 | Pos | 294.2 |
| GGGCC_II | Proanthocyanidins | 6.9 | Pos | 1492.2 |
| GCCCC_I | Proanthocyanidins | 6.9 | Pos | 1460.1 |
| CCCC_I | Proanthocyanidins | 7.3 | Pos | 1155.9 |
| GCCC_II | Proanthocyanidins | 7.3 | Pos | 1171.8 |
| CCCCC | Proanthocyanidins | 7.9 | Pos | 1444.1 |
| GCCCC_II | Proanthocyanidins | 7.9 | Pos | 1460.1 |
| CCCC_II | Proanthocyanidins | 8.5 | Pos | 1155.9 |
IS, C, and G stand for internal standard, catechin/ epicatechin and gallocatechin/ epigallocatechin, respectively.