Study on Proximate Composition of Rice (Oryza sativa) Bran and Chemical Properties with Fatty Acid Content of its’ Extracted Oil Collected from the Northern Region of Bangladesh

Abstract

Abstract Oryza sativa bran was analyzed for its proximate composition. The oil was extracted from the bran by the Soxhlet extraction method. Studies of some chemical properties and analysis of fatty acids by GC-MS of extracted oil were performed in this research work. The bran was collected from the Kurigram district of Bangladesh. The rice bran and the bran oil of this area are not much studied. The studies find out some significant properties and nutritional values of this area's rice bran and bran oil. The bran was rich in carbohydrates (38.78%), fats (20.30%), fiber (1.42%), and proteins (9.45%). Moisture and ash content were found 9.49% and 20.5% respectively. The important minerals were found by wet and dry tests like Fe, Zn, Ca, Mg, K, Na, etc. The higher saponification (110.13 mg KOH/g) value of the oil indicated that it could be used as raw materials in good quality soap. It was determined by refluxing the oil with alcoholic KOH solution followed by titration with standard acid. The low iodine (46.25 I2/100g) value of the oil indicated that it could be used for cooking purposes and the oil was stable and consisted of polyunsaturated fatty acids mainly oleic and linoleic acid. From the fatty acid analysis by GC-MS, it was found that the oil had a high content of fatty acids such as oleic acid, linoleic acid, palmitic acid, stearic acid, etc. These acids have high biological importance for human health.