Table 7. Preliminarily determined phenols in the aqueous extract of Rhizoma Zingiberis.
| Peak No. | t R (min) | [M+H]+ (m/z) | [M+H2O]+ (m/z) | [M+Na]+ (m/z) | [2M+Na]+ (m/z) | Identified phenols |
|---|---|---|---|---|---|---|
| 1 | 0.57 | 267 | — | 289 | — | 4-gingerol |
| 3 | 3.89 | 305 | — | — | — | 8-shogaol |
| 5 | 5.66 | 395 | — | — | — | Me-12-gingediol’isomer |
| 7 | 6.50 | 295 | 312 | 317 | 611 | 6-gingerol |
| 9 | 7.41 | 325 | — | 347 | — | 8-gingediol |
| 10 | 8.30 | 277 | 294 | 299 | 575 | 6-shogaol |
| 11 | 8.46 | 323 | 340 | 345 | 667 | 8-gingerol |
| 12 | 9.15 | — | 398 | 403 | — | 12-gingediol |
| 13 | 9.77 | — | 412 | 417 | — | Me-12-gingediol |
| 14 | 10.01 | 351 | 368 | 373 | 723 | 10-gingerol |
| 16 | 11.38 | 333 | 350 | 355 | 687 | 10-shogaol |