Extraction, Identification and Antimicrobial Activity of Some Phenolic Acids As Antioxidants in Teucrium polium Plant


A direct solvent extraction was used for the extraction of aerial parts of local medicinal plant Teucrium polium using methanol ,ethanol, iso-propanol, butanol, chloroform, acetone , ethyl acetate, and hexane. The total phenolic contents of extracts was determined using Folin-Ciocalteu method , the results shows that the highest extraction was obtained by methanol which was found to be equal to 100.144 mg/ g of dry plant. HPLC was employed to identification phenolic acid content especially Gallic acid in Teucrium polium extract with each solvent, The results showed that the highest extraction was obtained equals to 48.07% by methanol followed by acetone and ethanol, also the results shows that the n- hexane give the lowest extraction 4.27%, also butanol with iso-propanol extract contain the large number of phenolic acid contents. The accuracy and precision of this method were determined by preparing laboratory samples of Gallic acid , the results show absolute error ranging from ±0.3 to ± 1.5 , relative errors ranging from ±0.375 to 1.87 % , the standard deviation equal to 0.48 and the relative standard deviation did not exceed ±0.478 %,the standard deviation of the mean was 0.215. The antimicrobial activity of methanolic extracts of local medicinal plant Teucrium polium life samples from Dehok and Al-Kut were examined for their antimicrobial potentials against selected test bacteria and fungi, Aspergillus Niger , Aspergillus parasticus , Staphylococcus aurous positive, Staphylococcus aurous negative, Streptococcus , Escherichia coli and Cladosporium. The present results showed that all the extracts posses good antimicrobial activity against selected test bacteria and fungus. The present results therefore offer a scientific basis for traditional use of Teucrium polium for the treatment of bacterial and fungal infections.