Table 1.
Phenolic compounds identified in SBH by LC-MS/MS with ESI
| Peak No | RT (min) | [M-H]− (Frag. MS2 m/z) | Molecular formula | Compounds |
|---|---|---|---|---|
| 1 | 0.92 | 169 (125) | C7H6O5 | Gallic acid |
| 2 | 1.3 | 179 (135) | C9H8O4 | Caffeic acid |
| 3 | 1.74 | 283.8 (241, 221, 179) | C17H16O4 | Caffeic acid phenethyl ester |
| 4 | 2.09 | 197 (182, 147) | C9H10O5 | Syringic acid |
| 5 | 2.75 | 289 (244.9, 175, 147) | C15H14O6 | Catechin |
| 6 | 2.97 | 775 (715) | NI | Unknown |
| 7 | 3.87 | 269 (251, 225, 205) | C15H10O5 | Apigenin |
| 8 | 4.2 | 253 (209, 193, 178) | C15H10O4 | Chrysin |
| 9 | 4.77 | 221 | NA | Unknown |
| 10 | 5.3 | 147 (118, 129, 102) | C9H8O2 | Cinnamic acid |
| 11 | 5.67 | 162 | NI | Unknown |
| 12 | 6.5 | 165 (147, 119) | C9H8O3 | 2-Hydroxycinnamic acid |
| 13 | 7.6 | 285 (175, 151, 133) | C15H10O6 | Kaempferol |
| 14 | 8.5 | 163 (119) | C9H8O3 | P coumaric acid |
| 15 | 8.9 | 959 (913) | NI | Unknown |
| 16 | 9.6 | 609 (301) | C9H8O3 | quercetin-3-O-rutinosid |
| 17 | 10.2 | 614 (478, 452, 342) | NI | Unknown |
| 18 | 12.4 | 137 (93) | C7H6O3 | 4-Hydroxybenzoic acid |
NI, Not identified; RT, Retention time; [M-H]−, Molecular mass of honey extract on the loss of one proton measured by SIM