Table 1 HPLC-DAD profile of standards and PELE
Reference flavonoids/phenolics | Signal wavelength | Retention time (min) | Regression analysis | R2 | PELE (μg/mg dry extract) |
|---|---|---|---|---|---|
Gallic acid | 257 | 4.409 | y = 3.15x + 7.84 | 0.92 | 1.10 |
Rutin | 257 | 14.99 | y = 1.78x-35.74 | 0.93 | 113.8 |
Catechin | 279 | 7.237 | y = 1.875x + 6.5 | 0.99 | - |
Caffeic acid | 325 | 9.445 | y = 12.4x + 23.4 | 0.96 | 1.49 |
Apigenin | 325 | 21.757 | y = 12.8x + 76.54 | 0.97 | - |
Myricetin | 368 | 15.255 | y = 2.7x-13.5 | 0.94 | - |
Quercetin | 368 | 18.244 | y = 4.9x + 31.13 | 0.99 | - |
Kaempferol | 368 | 19.805 | y = 11.78x + 120.24 | 0.93 | 1.54 |