Table 2.
Identification and quantification of flavonoids and phenolics of seven crude extracts of R. arvensis through spectrophotometry and high performance liquid chromatography
| Total flavonoids and total phenolics ± SD | HPLC profile | |||||
|---|---|---|---|---|---|---|
| Extract | mg RE/g dry extract | GAE/g dry extract | RT (min) | λ max (nm) | Compound | % of dry weight |
| Chloroform extract | – | – | – | – | – | |
| Chloroform:methaol extract | 1.95 ± 0.01 | – | – | – | – | |
| Methanol extract | 6.00 ± 0.02 | 0.48 ± 0.03 | 15.00 | 257 | Rutin | 0.44 |
| – | – | 10.79 | 325 | Caffeic acid | 0.017 | |
| Methanol:acetone extract | 1.08 ± 0.01 | – | – | – | – | |
| Acetone extract | 0.96 ± 0.01 | – | – | – | – | |
| Methanol:water extract | 5.72 ± 0.01 | 1.06 ± 0.02 | 15.02 | 257 | Rutin | 0.01 |
| Water extract | 2.19 ± 0.01 | 1.43 ± 0.01 | 10.68 | 325 | Caffeic acid | 0.008 |
SD ±standard deviation, RT retention time.