Extraction and physicochemical characterization of oil and proximate composition of Poga oleosa seeds. – M. E. Kooffreh, E. B. Ikor and E.C . Okpako
ABSTRACT
The proximate composition analysis using the standard method of analysis of the A.O.A.C (1979) showed that Poga oleosa seeds contain the following: moisture (9.20 ± 0.13); ash (2.30 ± 0.02); Protein (16.80 ± 0.09); fat (21.20 ± 0.09); fibre (3.30 ± 0.009) and carbohydrate (56.40 ± 0.00). The physicochemical properties of the essential oil after extraction estimated the physical properties as follows: lipid colour (golden yellow); percentage lipid content (21.20 ±0.09); heat of combustion (46± 0.28); refraction Index (1.45078 ± 0.00); relative density (0.80 ± 0.09); smoke point (125.3 ± 0.27˚C); boiling point (140.6 ± 0.54˚C) and flash point (180.6 ±0.54˚C). The oil had chemical properties with values as follows: acid value (2.97± 0.09), iodine value (158.8± 0.09), saponification value (204.8± 0.18), ester value (201.8 ± 0.09), peroxide value (3.45 ± 0.02), percentage free fatty acid (1.49391 ± 0.0) and saponification equivalent (273.95 ± 0.25).