%0 Journal Article %T Evaluation of the Chemical Composition and Antioxidant Activity of the Essential Oils of Peucedanum longifolium (Waldst. & Kit.) and P. palimbioides (Boiss.) %A Bektas Tepe %A H. Askin Akpulat %A Munevver Sokmen %J Records of Natural Products %D 2011 %I ACG Publications %X This study was designed to evaluate the chemical composition and antioxidant activity of the essential oils of Peucedanum longifolium and P. palimbioides. According to the GC-MS analysis, 35 compounds were accounted for 96.98% of the total oil of P. longifolia. Major components of the oil were 8-cedren-13-ol (33.74%), myristicin (8.03%), germacrene-D (7.73%) and D -3-carene (6.38%). In the case of P. palimbioides, 26 compounds were identified comprising the 98.96% of the total oil. The major compounds were described as a -pinene (35.45%), (E)-9-octadecenoic acid (23.57%) and b -pinene (20.19%). In general, P. palimbioides oil exhibited stronger than that of P. longifolia in all test systems. Especially in b -carotene/linoleic acid system, P. palimbioides showed strong activity against linoleic acid oxidation at 2.0 mg/mL concentration (90.58% ¡À 1.56). This value is too close to the synthetic antioxidants BHT and BHA at the same concentration (95.86% ¡À 0.23 and 93.05% ¡À 1.04, respectively). This plant also exhibited excellent chelating effect (90.39% ¡À 0.28) which is obviously greater than that of P. longifolium at 2.0 mg/mL concentration (24.12% ¡À 2.50). Chelating effect of the control agent EDTA was measured as 98.78% ¡À 0.78 (2.0 mg/mL). %K Peucedanum longifolium %K Peucedanum palimbioides %K antioxidant activity %K essential oil %K chemical composition. %U http://www.acgpubs.org/RNP/2011/Volume%205/Issue%201/15-RNP-1006-243.pdf