Table 2.
Phenolic compounds quantification in Prosopis pallida flour derived from pod mesocarp (mean ± SD).
| Peak | Rt (min) | λmax (nm) | Molecular Ion [M-H]− (m/z) | MS2 (m/z) | Tentative Identification | Content [µm/g Extract] |
References |
|---|---|---|---|---|---|---|---|
| 1 | 9.6 | 333 | 593 | 503 (27), 473 (100), 443 (83), 383 (12), 353 (21), 325 (5) | Apigenin-6,8-di-C-hexoside (vicenin) A | 1864 ± 38 | [31,32] |
| 2 | 11.1 | 335 | 563 | 545 (23), 503 (53), 473 (100), 443 (69), 383 (39), 353 (42) | Apigenin-6-C-arabinoside-8-C-glucoside isomer 1 (Isoschaftoside) A | 115 ± 2 | [31,32] |
| 3 | 13.4 | 335 | 563 | 545 (10), 503 (78), 473 (100), 443 (79), 383 (31), 353 (28) | Apigenin-8-C-arabinoside-6-C-glucoside isomer 1 (schaftoside) A | 479 ± 7 | [31,32] |
| 4 | 13.7 | 335 | 563 | 545 (20), 503 (47), 473 (100), 443 (73), 383 (33), 353 (38) | Apigenin-6-C-arabinoside-8-C-glucoside isomer 2 (Isoschaftoside) A | 879 ± 22 | [31,32] |
| 5 | 15.1 | 330 | 563 | 545 (8),503 (73), 473 (100), 443 (83), 383 (37), 353 (26) | Apigenin-8-C-arabinoside-6-C-glucoside isomer 2 (schaftoside) A | 38 ± 1 | [31,32] |
| 6 | 21.3 | 332 | 623 | 315 (100) | Isorhamnetin-3-O-rutinoside B | 28.7 ± 0.2 | DAD, MS standard |
| 1 TPC | 3404 ± 52 |
1 TPC: Total phenolic compounds. Calibration curves: A—apigenin-6-C-glucoside (y = 107025x + 61531, R2 = 0.9989); B—quercetin-3-O-glucoside (y = 34843x – 160173, R2 = 0.9987).