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Table 1 Retention time (Rt), wavelengths of maximum absorption in the visible region (λmax), mass spectral data, and tentative identification of phenolic compounds in four selected A. gangeticus leafy vegetables

From: Polyphenol and flavonoid profiles and radical scavenging activity in leafy vegetable Amaranthus gangeticus

Peak no Rt
(min)
λmax (nm) Molecular ion
[M - H]
(m/z)
MS2
(m/z)
Identity of tentative compounds
1 9.12 254 169.1354 169.1465 3,4,5 Trihydroxybenzoic acid
2 30.61 254 167.1423 167.1634 4-Hydroxy-3-methoxy benzoic acid
3 34.82 254 197.1125 197.1125 3,5-Dimethoxy-4-hydroxybenzoic acid
4 31.52 254 137.0325 137.0425 4-Hydroxybenzoic acid
5 48.23 254 137.2216 137.3241 2-Hydroxybenzoic acid
6 52.51 254 301.0384 301.0586 2,3,7,8-Tetrahydroxy-chromeno [5,4,3-cde] chromene-5,10-dione
7 2.24 280 154.1342 154.1452 3,4-Dihydroxybenzoic acid
8 4.13 280 154.1354 154.1387 2,4-Dihydroxybenzoic acid
9 3.71 280 154.1357 154.1456 2,5- Dihydroxybenzoic acid
10 32.12 280 179.0792 179.0748 3,4-Dihydroxy-trans-cinnamate
11 31.14 280 353.1352 353.1453 3-(3,4-Dihydroxy cinnamoyl) quinic acid
12 42.16 280 163.0586 163.1105 4-Hydroxy cinnamic acid
13 47.95 280 193.1843 193.1748 3-Methoxy-4-hydroxy cinnamic acid
14 49.61 280 163.2621 163.2784 3-Hydroxy cinnamic acid
15 49.14 280 223.1632 223.1752 4-Hydroxy-3,5-dimethoxy cinnamic acid
16 67.32 280 147.1214 147.1143 3-Phenyl acrylic acid
17 23.93 280 290.2368 290.2246 (2R-3S)-2-(3,4-dihydroxyphenyl)-3,4-dihydro-2-chromene-3,5,7-triol
18 26.73 280 271.0746 271.1527 Naringenin
19 54.35 360 463.2795 463.3345 Quercetin-3-O-glucoside
20 53.32 360 463.4428 463.5243 Quercetin-3-O-galactoside
21 53.34 360 609.3788 609.3687 Quercetin-3-O-rutinoside
22 7.56 370 301.0425 301.0348 2-(3,4-dihydroxy phenyl)-3,5,7-trihydroxychromene-4-one
23 4.61 370 626.1954 626.2675 Myricetin-3-O-rutinoside
24 15.45 370 270.3426 270.3548 4′,5,7-Trihydroxyflavone, 5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-benzopyrone
25 17.82 370 593.5214 593.3264 kaempferol-3-O-rutinoside