Isolation and Characterization of Some Phytochemicals from Indian Traditional Plants

摘要

The present study was designed to evaluate relative contribution of different polyphenols (total phenolics, flavonoids, flavonols) and their antioxidants activities in aqueous extracts of different parts of some plants;Argemone mexicana,Datura metel,Calotropis procera,Thevetia peruviana, andCannabis sativa. The antioxidants (total phenolics, flavonoids, flavones) were determined by chemical methods. The antioxidant capacities of these extracts were evaluated by FRAP assay. The results demonstrated that phenolic content was maximally present in leaves ofT. peruviana. This plant exhibited minimum phenolic content in its flower as compared to other plants. The flower ofD. metelcontained maximum phenolic content. The flavonoids were present in highest quantity in leaves ofC. procerawhileT. peruvianaflowers showed maximum flavonoid content. The fruits ofC. sativacontained maximum quantity of flavonoid as compared to other plants tested. The flower extract ofC. sativapossessed highest FRAP value followed byA. mexicanaand fruit ofC. procera.The values of ratios of different polyphenolic compounds present in plant extracts indicated that flower ofD. metelcontained maximum total flavonoids and minimum phenolics. These results suggested that levels of total phenolics, flavonoids and their FRAP indices exhibited specificity to different plants and their parts.