Table 2.
Retention time (Rt), wavelengths of maximum absorption in the visible region (λmax), mass spectral data and tentative identification of phenolic compounds in selected Amaranthus tricolor leaves.
| Peak no | Rt (min) | λmax (nm) | Molecular ion [M − H]− (m/z) | MS2 (m/z) | Identity of tentative compounds |
|---|---|---|---|---|---|
| 1 | 9.1 | 254 | 169 | 169.2 | 3,4-5 Trihydroxybenzoic acid |
| 2 | 30.6 | 254 | 167 | 167.2 | 4-hydroxy-3-methoxybenzoic acid |
| 3 | 34.8 | 254 | 197 | 197.1 | 4-Hydroxy-3,5-dimethoxybenzoic acid |
| 4 | 31.5 | 254 | 137 | 137.2 | 4-hydroxybenzoic acid |
| 5 | 48.2 | 254 | 137 | 137.2 | 2-Hydroxybenzoic acid |
| 6 | 52.5 | 254 | 301 | 301.1 | (2,3,7,8-tetrahydroxy-chromeno [5,4,3-cde]chromene-5,10-dione |
| 7 | 32.0 | 280 | 179 | 179.1 | 3,4-Dihydroxy-trans-cinnamate |
| 8 | 31.1 | 280 | 353 | 353.2 | 3-(3,4-Dihydroxycinnamoyl) quinic acid |
| 9 | 42.0 | 280 | 163 | 163.1 | 4-hydroxycinnamic acid |
| 10 | 47.9 | 280 | 193 | 193.2 | 4-hydroxy-3-methoxycinnamic acid |
| 11 | 49.6 | 280 | 163 | 163.3 | 3-hydroxycinnamic acid |
| 12 | 49.0 | 280 | 223 | 223.2 | 4-Hydroxy-3,5-dimethoxycinnamic acid |
| 13 | 67.3 | 280 | 147 | 147.1 | 3-Phenylacrylic acid |
| 14 | 54.3 | 360 | 463 | 463.3 | Quercetin-3-glucoside |
| 15 | 53.3 | 360 | 463 | 463.5 | Quercetin-3-galactoside |
| 16 | 53.0 | 360 | 609 | 609.4 | Quercetin-3-rutinoside |