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Molecular Ions for Peaks Found in Representative Chlorogenic Acid Sample Using Negative Ion Electrospray Ionization Liquid Chromatography/Mass Spectrometry Analysis
| Compound | Retention time (minutes) | (M–H)− (m/z) |
|---|---|---|
| Chlorogenic acids | ||
| 3-Caffeoylquinic acid | 20.0 | 353 |
| 5-Caffeoylquinic acid | 24.5 | 353 |
| 4-Caffeoylquinic acid | 25.5 | 353 |
| Feruloylquinic acids | 26.0 | 367 |
| 33.0 | 367 | |
| Caffeoylquinic acid dimers | 42.3 | 515 |
| 44.0 | 515 | |
| 46.0 | 515 | |
| Feruloylquinic acid dimers | 48.3 | 529 |
| 49.0 | 529 | |
| 51.7 | 529 | |
| 54.0 | 529 | |
