The study of flavonoids and antioxidant power of etanolic,metanolic,hydroalcholic and etylacetatic extracts of branch and stem bark of Salix alba

Medical Plants like Salix alba are potential sources of natural antioxidants and produce various antioxidative compounds to counteract reactive oxygen species.
The aim of the present study was to determine total phenol and flavonoid and antioxidant activity of four various extracts of stem and branch barks of Salix alba from Hamedan.
In this study Phenol and flavnoid tests were done To determine antioxidant compounds. 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay was used to determine the free radical quenching capacity.The collected data was analyzed by SPSS software.
The highest value of total phenol were relevant to ethanolic extracts of branch and stem barks that 60.87± 1.19 and 69.98 ± 1.41 mg Gallic acid/g dw was measured, respectively and the lowest value of total phenol were determined to chloroformic extracts. The highest level of total flavnoid in branch and stem barks were relevant to ethanolic extract amount 71.20± 4.08 and 60.87± 1.19 respectively and also the lowest level were determined to chloroformic extracts of stem and branch barks amount 12.56± 0.29 and 13.80± 0.57 respectively. Furthermore the most activity of the free radical quenching capacity DPPH after Ascorbic Acid were determined to ethanolic extracts of branch and stem bark 0.129 and 0.130 mg /ml. There were significant differences between means of total flavnoid and total phenol of stem and branch barks.In conclusion,The best antioxidant activity were relevant to ethanolic extracts of branch and stem barks.