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Abstract
The genus Nepeta (Lamiaceae) and Achillea (Asteraceae) are widely distributed in Turkey. In this study, the essential oils of Nepeta italica L. and Achillea filipendulina LAM. collected from Dicle district in Diyarbakir province in the Southeast Anatolia and from Hakkari province in East Anatolia of Turkey, were obtained by hydrodistillation of the aerial parts. The essential oils from Nepeta italica and Achillea filipendulina obtained by hydrodistillation were analyzed by gas chromatography-mass spectrometry GC Clarus 600-MS Clarus 600 C (Perkin Elmer) and microelements were analyzed by Perkin Elmer Optima 2100 DV ICP OEMS, and also antioxidant activity analyzed by DPPH radical scavenging assay. Achillea filipendulina and Nepeta italica essential oils showed similar antioxidant activity with inhibition of 55.3 % and 51.3 %, respectively, which are higher than BHT synthetic antioxidant with 23 % inhibition.