Characterization of Adansonia Digitata Seeds Oil and its Antioxidant Activity on Sunflower and Ground nut Oils

Abstract

The present study was carried out to investigate the composition of Adansonia digitata seeds oil, and to test the ability of the oil to enrich the antioxidant property of other oils namely sunflower and ground nut oils. The proximate composition of Adansonia digitata seeds gave: oil content [21.84%], moisture content [4.69%], protein [19.90%], crude fiber [27.95%], ash [3.24%], crude lipid [0.65] and carbohydrate were found to be [21.73%]. The minerals content of the seeds in (ppm) was: Ca [1.38], Mg [4.94], Fe [0.226], Cu [0.013], Zn [0.014], Mn [0.017], Ni [0.13] and Na [347]. The physical properties are: density [0.6069g/cm3], refractive index [1.469], viscosity [22.00cp] and the color [Golden yellow]. The physicochemical properties are: the acid value [1.3153mgKOH/g], saponification value [175.24 mg KOH/g], the unsaponified matter [12.12 g/kg], the peroxide value [2.30mEq O2/kg], iodine value [84.58 I2/100g] and ester value [173.93]. The GC-MS analysis of the oil revealed the presence of 26 components. Major constituents are: 9, 12 -octadecadienoic acid (Z, Z) methyl ester (27.60%); 9-octadecenoic acid (Z) methyl ester (22.81%); hexadecenoic acid methyl ester (21.03%) and methyl Stearate was (7.03%). Though, the seed oil of Adansonia digitata is highly stable, its effect on the stability of sunflower and ground nut oils was week.