Abstract

MUNOZ-ACEVEDO, Amner; KOUZNETSOV, Vladimir V.  and  STASHENKO, Elena E.. Composition and in-vitro antioxidant capacity of essential oils rich in Thymol, Carvacrol, trans-Anethole or Estragole. Rev. Univ. Ind. Santander. Salud [online]. 2009, vol.41, n.3, pp.287-294. ISSN 0121-0807.

Gas chromatography coupled to mass spectrometry (GC-MS) was used to determine the chemical composition of essential oils (EO) isolated by microwave-radiation-assisted hydrodistillation (MWHD) of Artemisia dracunculus, Foeniculum vulgare, Illicium verum, Lippia micromera, Lippia origanoides, Ocimum sp., Plectranthus amboinicus, Tagetes filifolia, Tagetes lucida and Thymus vulgaris. in vitro antioxidant capacity values using ABTS^+• discoloration assays (traditional and microplate methods) and the linoleic acid oxidation (with O₂ and Fe⁺²) of these essential oils were obtained. Essential oils with phenols (carvacrol and thymol) high content showed higher total antioxidant capacity values than the essential oils rich in ether compounds (estragole and trans-anethole). The antioxidant capacity using by modified ABTS^+• assay in decreasing order was as follows: EO Plectranthus amboinicus ≥ EO Lippia origanoides >> EO Thymus vulgaris > EO Lippia micromera >>> EO Tagetes lucida (flowers) > EO Ocimum sp. > EO Tagetes lucida (leaf) > EO Illicium verum > EO Tagetes filifolia (Cenivam) > EO Foeniculum vulgare. Salud UIS 2009; 41: 287-294.

Keywords : GC-MS; MWHD; phenols; ethers; essential oils; linoleic acid; ABTS^+•.

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