Investigation of Physicochemical, Spectroscopic Characteristics and the Concentration of Some Metals in Canola Oil

Abstract

Canola oil is extracted from Rapeseed which of the family of the Brassicaceae. The oil is used in cosmetic, medicine, cooking, and soaps. In this study the chemical properties of canola oil which are acid value, percent free fatty acid, saponification value and peroxide value were determined. It has been shown 0.5035 mg/g, 0.253%, 186.26 mg/g and 1.05 mg/kg respectively. Also physical properties like density and colour was found to be 0.914 g/ml, and yellow respectively. Chemical bonds and functional group were also detected in canola oil. It shown to contain a double bond and terpenoids, by simple test, also was shown the absence of phenol functional group. The composition of canola oil was studied by IR analysis to detect the functional group like carbonyl group, C-H saturated bond and O-H group. The concentration of metal ions like Na, Fe, Zn and Cu were determined using atomic absorption spectrophotometer and was found to be 9.3885, 0.632, 0.0549, 0.116 mg/L respectively. The fatty acids in canola oil have been identified by the GC - FID, and shown to have a number of fatty acids such as oleic acid, linoleic, palmitic and other acids.