Table 2 Characteristic ions and contents of phenolic acids of sunflower seed
Compounds name | Contents (mg/100 g of DM) | [M−H]− (m/z) | Fragment ions (m/z) | |
|---|---|---|---|---|
Non-oilseed | Oilseed | |||
Ferulic acid | 7.6 ± 3.6 | 12.4 ± 2.0 | 193 | 193, 134 |
Caffeic acid | 20.5 ± 1.6 | 26.7 ± 1.1 | 179 | 179, 135 |
Non-esterified phenolic acids | 28.1 ± 4.0 | 39.0 ± 2.3 |  |  |
3-O-caffeoylquinic acid | 480 ± 21.6 | 439.9 ± 8.6 | 353 | 191, 179, 192,180, 135,134 |
4-O-caffeoylquinic acid | 58.2 ± 0.8 | 87.5 ± 4.1 | 353 | 191, 179, 173, 135 |
5-O-caffeoylquinic acid | 2795.7 ± 167.4 | 2467.0 ± 13.9 | 353 | 191, 179, 135 |
5-O-p-coumaroylquinic acid | 11.3 ± 2.4 | 113 ± 1.0 | 337 | 191, 163 |
5-O-feruloyquinic acid | 16.5 ± 1.5 | 113 ± 1.0 | 367 | 191, 173, 111, 193, 274, 336 |
Coumaric and ferulic acid derivative | 27.9 ± 2.8 | 22.6 ± 1.4 |  |  |
Dicaffeoylquinic acid | 196.2 ± 7.0 | 360.9 ± 1.1 | 515 | 353, 335,191, 179, 173,135 |
Caffeoylquinic acid | 24.7 ± 3.3 | 365 ± 22 | 353 | 191 |
Monocaffeoylquinic acids | 3358.8 ± 168.8 | 3030.9 ± 17.0 |  |  |
3,4-Di-o-caffeoylquinic acid | 14.9 ± 5.8 | 28.8 ± 0.3 | 515 | 353, 173, 179, 498, 191, 354, 335, 203, 299 |
3,5-Di-o-caffeoylquinic acid | 135.0 ± 3.0 | 211.2 ± 1.1 | 515 | 353, 191, 179, 135, 173 |
4,5-Di-o-caffeoylquinic acid | 46.3 ± 2.7 | 120.9 ± 0.2 | 515 | 353, 173, 203, 179, 299, 255, 191, 335, 317 |