Chemical and Physicochemical characteristics of Roselle seeds oil (Hibiscus sabdariffa L.)

Abstract

This study was conducted at Sudan University of Science and Technology, college of Agricultural Studies, Department of food Science and Technology in order to recognize rosella seed oil and determine Physicochemical characteristic. The seeds were cleaned and crushed for proximate analysis which include oil content , protein content , moisture content , total ash , crude fiber, and carbohydrate , then the results were recorded 21.1 , 27.1 , 7.2 , 6.7, 16.2 , 21.7 respectively. The oil was extracted by solvents extraction, the physical properties of oil refractive index , moisture content , specific gravity and color were tested the result were recorded 1.4643 , 2.07 , 0.8985 yellow 70 red 2.9. respectively. Also the chemical properties which are peroxide value, free fatty acids, saponification value, and iodine value were tested the results were recorded 1.2, 2.5, 192, 103, respectively. Rosella seed oil contain great amount of oil with good physical and chemical characteristics. It could be one of the promising source of vegetable oil production in Sudan. IV