Table 5.
Ultraviolet-visual and mass spectrometric data of the major polyphenols detected in the DES extracts of SPW, obtained under optimal conditions.
| No | Rt (min) | UV-vis | [M + H]+ (m/z) | Fragment Ions (m/z) | Tentative Identity |
|---|---|---|---|---|---|
| Flavonols | |||||
| 1 | 21.08 | 265, 346 | 773 | 611, 449, 287 | Kaempferol 3-O-sophoroside 7-O-glucoside |
| 2 | 29.81 | 254, 351 | 627 | 303 | Quercetin 3-O-sophoroside |
| 3 | 32.63 | 265, 346 | 611 | 449, 287 | Kaempferol 3-O-sophoroside |
| 4 | 38.87 | 265, 352 | 449 | 287 | Kaempferol 3-O-glucoside |
| Anthocyanins | |||||
| 5 | 15.62 | 274, 523 | 627 | 465 | Delphinidin 3,5-di-O-glucoside |
| 6 | 18.72 | 272, 523 | 641 | 465 | Petunidin 3,5-di-O-glucoside |
| 7 | 20.08 | 271, 523 | 465 | 303 | Delphinidin 3-O-glucoside |