Phytochemical Screening, Total Phenolic Contents and Antioxidant Activity ofSyzygium caryophyllatumandSyzygium densiflorum

To search the new sources of antioxidants, leaves of Syzygium caryophyllatum and Syzygium densiflorum were screened for total phenolics and antioxidant activity. The leaves of the plants were extracted with hexane, ethyl acetate and methanol, and screened for their phytochemicals, phenolic content (TPC), and flavonoid content (TFC) and antioxidant activity. Phytochemical analysis of the both plants revealed the existence of flavonoids, tannins, glycosides, terpenoids and protein. Phenolic and flavonoid contents presents in both plants were varied with respect to solvents. Methanol extract of S. caryophyllatum exhibited highest DPPH radical scavenging activity and ferric reducing power followed by ethyl acetate and hexane extracts (81.97, 78.69, 34.34 % and 0.978, 0.916 & 0.691 %). Ethyl acetate extract of S. densiflorum exhibited highest DPPH radical scavenging activity and ferric reducing power (98.76, 87.36 & 43.39) and (1.560, 1.037 & 0.604). In conclusion, these plants are rich sources of phenolic compounds and antixodants and they could be used as natural antioxidant.