Physico-chemical properties, fatty acid and tocopherol composition of oils from some Sudanese oil bearing sources

Abstract

Seven oils, obtained from seven Sudanese oil bearing sources that are Albizia lebbek Oil (ALO), Cassia obtusifolia Oil (COO), Cassia occidentalis Oil (CCO), Abution pannosum Oil (APO), Mitracarpus villous Oil (MVO), Ipomea Indica Oil (IIO) and Sesamum alatum Oil (SAO), were investigated. The seeds were collected in Sudan from Ghibalsh, North Kordofan state. In addition to the oil content, the fatty acid was determined by capillary gas chromatography and the tocopherols were evaluated by highperformance liquid chromatography. The oil content of the seven seeds amounted to 12.8, 7.0, 3.2, 7.1, 11.5, 8.8, and 21.3%, respectively. The oils contained 16.4, 20.0, 14.3, 16.8, 19.4, 19.9 and 10.9% palmitic acid and 21.0, 24.4, 22.1, 10.9, 27.7, 34.0, 45.1% oleic acid, and 43.8, 38.2, 45.0, 63.9, 34.6, 33.5, 36.3% linoleic acid and traces of linolenic acid, respectively. The tocopherol content of these oils amounted to 85.6, 48.2, 32.7, 163.5, 52.5, 30.9, and 26.4 mg/100 g oil, respectively. Alpha tocopherol was the predominant tocopherol In the oil of Albizia lebbak, Cassia obtusifolia), Cassia occidentalis, and Abutilon pannosum, while Gamma tocopherol was the predominant tocopherol in the oil of Mitracarpus villous, Ipomea Indlca and Sesamum alatum.