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HPLC characteristics for the Catechin and Caffeic Acid content for the methanolic leaf extracts of the Catharanthus roseus plants (test samples)
| Samples | Stock | Retention time (min) | Area (mv*S) | Catechin Content ug/ ml of extract | Dilution factor | Catechin Content mg/ g of extract |
|---|---|---|---|---|---|---|
| Catechin (ug/ ml) | 100 | 2.437 | 365.026 | – | – | – |
| Sample (C. roseus) (mg/ ml) | 10 | 2.310 | 20.130 | 5.51 | 1 | 0.0055 |
| Caffeic acid (ug/ ml) | 100 | 1.897 | 629.931 | – | – | – |
| Sample (C. roseus) (mg/ ml) | 10 | 1.807 | 54.240 | 14.86 | 1 | 0.0149 |
