Table 1.
Flavonoid concentration (µg/g DW) measured by quantitative HPLC-UV using analytical standards (compounds) in ethanolic (EtOH) and methanolic (MetOH) extracts of Agave lechuguilla by-product from three different sampled sites (Matehuala, Tuxtepec and Cosme).
| Peak N° | Compounds | Concentration (µg/g DW) | |||||
|---|---|---|---|---|---|---|---|
| Site | |||||||
| Matehuala | Cosme | Tuxtepec | |||||
| Extractive Solvent | |||||||
| MetOH | EtOH | MetOH | EtOH | MetOH | EtOH | ||
| 1 | Flavanone ** | 520.13 ± 39.98 c | 276.19 ± 16.35 ab | 359.86 ± 55.98 b | 224.78 ± 19.59 a | 214.10 ± 24.10 a | 284.01 ± 10.61 ab |
| 2 | Isorhamnetin ** | 1416.70 ± 150.32 c | 753.97 ± 48.25 a | 981.55 ± 89.85 b | 614.32 ± 24.94 a | 1251.96 ± 58.24 c | 752.80 ± 2.91 a |
| 4 | Catechin * | 2.79 ± 0.26 a | 1.80 ± 0.07 a | 3.98 ± 1.30 ab | 4.97 ± 2.26 ab | 7.91 ± 3.62 b | 4.38 ± 0.50 ab |
| 5 | Cyanidin ** | 0.00 a | 0.00 a | 0.00 a | 3.53 ± 0.22 b | 0.00 a | 10.48 ± 2.61 c |
| 6 | Delphinidin ** | 0.00 a | 0.00 a | 0.00 a | 11.42 ± 0.32 b | 0.00 a | 21.55 ± 3.79 c |
| 7 | Hesperidin ** | 32.90 ± 4.54 b | 4.00 ± 0.13 a | 32.96 ± 3.73 b | 4.05 ± 0.29 a | 34.23 ± 0.95 b | 4.69 ± 0.19 a |
| 8 | Quercetin * | 12.08 ± 0.69 a | 11.65 ± 0.66 a | 13.24 ± 0.80 ab | 13.73 ± 0.25 ab | 15.57 ± 2.47 b | 13.48 ± 0.32 ab |
| 9 | Apigenin * | 6.93 ± 0.29 a | 7.88 ± 0.33 ab | 7.95 ± 0.54 ab | 7.85 ± 0.84 ab | 9.70 ± 1.96 b | 9.25 ± 0.61 ab |
| 10 | Kaempferol | 12.29 ± 1.37 a | 12.78 ± 0.75 a | 12.82 ± 0.27 a | 12.77 ± 0.43 a | 13.71 ± 1.01 a | 13.48 ± 0.31 a |
| 11 | Naringenin * | 1.26 ± 0.08 a | 1.43 ± 0.07 ab | 1.45 ± 0.10 ab | 1.43 ± 0.15 ab | 1.76 ± 0.36 b | 1.68 ± 0.11 ab |
| Total | 2005.08 | 1069.70 | 1413.56 | 898.85 | 1548.94 | 1115.80 | |
The same superscript letter within a line indicates no significant difference (two-way ANOVA, n = 3, p-value < 0.05 *, < 0.001 **.