Table 5.
Concentration of anthocyanins found in ethanolic and hydroethanolic grape pomace extracts by UPLC-ESI-ToF-MS.
| RT | m [M]+ | [E-GPE] | [HE-GPE] | |
|---|---|---|---|---|
| Malvidin 3-O-glucoside (C23H25O12+) | 5.77 | 493.135 | 148.9 ± 22.3 | 587.8 ± 88.2 |
| Delphinidin-3-O-glucoside (C21H21O12+) | 6.68 | 465.103 | 91.0 ± 13.7 | 265.5 ± 39.8 |
| Malvidin-3-O-(6-O-acetyl)glucoside (C25H27O13+) | 6.81 | 535.145 | 188.2 ± 28.2 | 558.1 ± 83.7 |
| Malvidin-3-O-(6-O-caffeoyl)glucoside (C32H31O15+) | 7.05 | 655.166 | 43.6 ± 6.5 | 105.3 ± 15.8 |
| Cyanidin-3-O-glucoside (C21H21O11+) | 7.12 | 449.108 | 36.0 ± 5.4 | 75.7 ± 11.3 |
| Petunidin-3-O-glucoside (C22H23O12+) | 7.22 | 479.119 | 54.1 ± 8.1 | 132.7 ± 19.9 |
| Malvidin-3-(6-O-coumaroyl)glucoside (C32H31O14+) | 7.51 | 639.171 | 177.1 ± 26.6 | 401.2 ± 60.2 |
RT: retention time; m[M]+: monoisotopic mass of the positive ion; [E-GPE]: concentration of the compound in the ethanolic grape pomace extract (mg/L); [HE-GPE]: concentration of the compound in the hydroalcoholic grape pomace extract (mg/L)