A comparative assessment of phytochemical screening, antioxidant and antimicrobial activities between leaf and dust of black tea extracts

Abstract

The present study is designed to investigate the comparison level of antimicrobial, antioxidant properties and as well as the total phenolic content estimation of aqueous extract between dusts and leaf black tea. Antimicrobial assay as well as antioxidant activity of phyto-compounds in both types of black tea was detected by using agar well diffusion and chromatographic technique respectively. Total antioxidant activity and phenolic content were measured by using coloriemetric method. In comparison level the antimicrobial activity and screening of phytochemical compounds like saponins, phenolic compounds & tannins, flavonoids, triterpenoids were significantly (P<0.05) different in both aqueous extract of leaf black tea and dust black tea. Total phenolic contents in the leaf black tea were 130.51mg Gallic acid equivalent/g of dried aqueous extract. In conclusion the leaf black tea has potential to be used as a natural antioxidant which is attributed to the rich presence of secondary metabolites and exhibit medicinal as well as physiological activities