Physicochemical and Fatty Acid Composition of Crude and Refined Oils of African Canarium

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Author(s) Ayoade, G.W | Amoo I.A | V.O.E. Akpambang
Pages 230-234
Volume 4
Issue 5
Date May, 2015
Keywords Canarium Seed, Physicochemical, Fatty Acid, Crude Oil, Refined Oil
Abstract

The physicochemical properties and fatty acid composition of crude and refined oil of Canarium seed were investigated using standard methods. Physicochemical properties of crude and refined oils were colour (dark green and greenish yellow), specific gravity (0.9516 and 0.8621), refractive index (1.4012 and1.3034), acid value (1.14 and 0.64) mgKOH/g, free fatty acid (0.96 and 0.34), peroxide value (1.08 and 0.71) meq/kg, iodine value (96.51 and 117.29), saponification value (148.3 and 126.8) mgKOH/kg, unsaponifiable matter (1.73 and 1.21) %, freezing point (-7.5 and 13.0) oC, melting point (43.0 and 39.0) oC, smoke point (187 and 203) oC, flash point (283 and 317) oC and fire point (345 and 358) oC respectively. The fatty acid composition of crude and refined oils respectively are; stearic (10.765 and 11.481) %, myristic (2.612 and 2.963) %, palmitic (0.358 and 0.574) %, capric (0.013 and 0.024) % and total saturated (15.042 and 13.748) %. The unsaturated are; oleic (31.621 and 35.386) %, palmitoleic (0.053 and 0.142) %, erudic (1.017 and 1.084) %, linoleic (23.724 and 28.612) % and linolenic (0.638 and 0.086) %, total unsaturated (57.053 and 66.370) %. The total fatty acid determined in crude and refined oils are (72.095 and 80.118) % and total undetected was 27.905 and 19.882 % respectively. The study concluded that the seed pulp of canarium is a good source of fat. The extracted oil of canarium seed is better consumed in refined form for its better physicochemical properties and unsaturated fatty acid composition.

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