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The aim of this study is to extract the important antioxidants components of flaxseed in different ways. The Determination of total phenol content, antioxidant activity and percentage of linoleic acid inhibition by DPPH for the components (Lignan, oil, 80 and 100% ethanolic extract and the deionized water extract). The components of flaxseed oil were identified using GC/MS. The efficiency of the mixture (80% ethanolic extract and oil) was determined by inhibiting the process of oxidation of linoleic acid during storage periods (0, 7, 14 and 21 days) at laboratory temperature, and the following results were obtained: The yield of lignan, oil, ethanol extract (80 and 100)% and deionized water were (0.12,40.52,10.9,9.6 and 13 )g.100g seed respectively, while the total phenolic content of the above components was (700,1165,3315,2098 and 483)mgGAE.100g,respectively. Flaxseed oil gave the highest antioxidant activity 79.3% with an inhibition percentage 73.19%, compared with ethanolic extract, lignan and water extract. The diagnosis of GC/MS flaxseed oil showed that the oil was contained in compounds with antioxidant activity, including mono, di and tri-terpens such as Copaene, Monoterpene, βSesquiphellandrene, Squalene, diethyl phthalate ,β-Sitosterol and Hexadecanoic acid, as well as, the presence of ascorbic acid and gamma tocopherol with good concentrations (8.68 and 2.62)% respectively. The mixture of 80% ethanol and oil extract showed an effect in decreasing of peroxide values with an increase of concentration of the added mixture (0.1, 0.4 and 0.10 mg.mg). The maximum reduction of the peroxide value at the concentration was 0.6 mg. mg, compared with the standard sample during the different durations of storage. Key word: Flaxseed compounds, Bioactive compound, Total phenol, Antioxidant activity.

Diagnose the Bioactive Compounds in Flaxseed Extract and Its Oil and Use Their Mixture as an Antioxidant