Table 2.
HPLC-MS/MS analysis of extracts obtained under optimal conditions for TPC and TFC, where tR—retention time.
| Compounds | tR (min) | MRM (m/z) | µg g−1 | |
|---|---|---|---|---|
| TPC | TFC | |||
| Coumaric acid | 3.550 | 163–93 | 1.93 | 5.50 |
| Salicylic acid | 4.054 | 137–93 | 157.77 | 220.63 |
| Caffeic acid | 3.177 | 179–134 | 0.31 | 0.66 |
| Syringic acid | 3.243 | 197–95 | 7.87 | 8.64 |
| Ferulic acid | 3.682 | 193–133 | 83.73 | 106.22 |
| Protocatechuic acid | 2.582 | 153–108 | 0.13 | 0.17 |
| Sinapic acid | 3.653 | 223–121 | 0.97 | 0.84 |
| 4-hydroxybenzoic acid | 2.940 | 137–65 | n.d. | 0.07 |
| Biochanin A | 5.672 | 283–211 | 2.40 | 0.84 |
| Esculetin | 3.183 | 177–89 | n.d. | 0.10 |
| Esculin | 2.592 | 339–177 | n.d. | n.d. |
| Naringenin | 4.844 | 271–119 | 0.15 | 0.21 |
| Naringin | 3.528 | 579–271 | 0.01 | 0.01 |
| Quercetin | 4.462 | 301–227 | 1.53 | 1.76 |
| Rutin | 3.506 | 609–300 | n.d. | n.d. |
| Luteolin | 4.543 | 285–133 | 0.04 | 0.12 |
| Apigenin | 4.864 | 269–117 | 1.26 | 2.14 |
| Σ = 258.11 | Σ = 347.91 | |||