Table 1.
Retention time (Rt), wavelengths of maximum absorption in the visible region (λmax), mass spectral data and tentative identification of flavonols, flavanols, flavones, and flavanones in four selected salt-tolerant vegetable amaranths.
| Peak no | Rt (min) | λmax (nm) | Molecular ion [M–H]− (m/z) | MS2 (m/z) | Identity of tentative compounds |
|---|---|---|---|---|---|
| 1 | 4.58 | 370 | 626.1882 | 626.2714 | Myricetin-3-O-rutinoside |
| 2 | 7.55 | 370 | 301.0426 | 301.0421 | 2-(3,4-dihydroxy phenyl)-3,5,7-trihydroxychromene-4-one |
| 3 | 15.47 | 370 | 270.3432 | 270.3324 | 4′,5,7-Trihydroxyflavone, 5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-benzopyrone |
| 4 | 17.84 | 370 | 593.5312 | 593.3412 | kaempferol-3-O-rutinoside |
| 5 | 23.91 | 280 | 290.2287 | 290.2175 | (2R-3S)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2-chromene-3,5,7-triol |
| 6 | 26.74 | 280 | 271.0812 | 271.1621 | Naringenin |
| 7 | 54.36 | 360 | 463.3215 | 463.3287 | Quercetin-3-O-glucoside |
| 8 | 53.35 | 360 | 463.4621 | 463.5325 | Quercetin-3-O-galactoside |
| 9 | 53.36 | 360 | 609.3698 | 609.3574 | Quercetin-3-O-rutinoside |