Effect of Storage on Quality of Branded Edible Oils from Elobeid Supermarket Compared with SSMO 1995
The current study was carried out in the Laboratory of Biochemistry and Food Science, Faculty of Natural Resources and Environmental Studies, University of Kordofan Sudan. The aim of this research was to examine the impact of storage duration on the quality parameters of various brands of edible oils collected from Elobeid Supermarket North Kordofan State Sudan in comparison with SSMO 1995 standards. The oils analyzed included Abrar, Groundnut, Crystal, Sabah, Factory Sesame oil, and Shams, which were stored at ambient temperature (37°C ± 4°C) for periods of 0, 2, 4, 6, 8, 10, and 12 months. Oil samples were taken after each storage interval to assess changes in quality parameters, including Acid value, Free Fatty Acids (FFA%), peroxide values, Anisidine values, Totox values, and polymer content. The data collected were analyzed using the Statistical Package for Social Sciences (SPSS). Means (±SD) were evaluated through one-way analysis of variance (ANOVA) and subsequently separated using Duncan’s Multiple Range Test (DMRT) as per Duncan, 1995. In terms of Acid value and FFA, the findings indicated that Abrar oil, Groundnut oil, and Sesame Factory oil exhibited poor storage stability, as all measured values exceeded the permissible limits (0.6 mg KOH/g and 0.3%, respectively) even at the initial time point (0 months). Regarding peroxide values, Abrar, Groundnut, Crystal, and Sabah oils were found to be above the recommended threshold (10 Meq/Kg oil) from the start of the storage period (0 months), while Sesame Factory oil conformed to specifications at 0, 2, and 4 months, and Shams oil remained within specifications until the 8-month storage period. Concerning Anisidine values, Groundnut oil, Sesame Factory oil, and Shams oil remained within the recommended limit (26 Meq/Kg oil) throughout all storage durations, whereas Abrar oil consistently recorded values exceeding the acceptable limit from the beginning to the end of the storage period. With respect to Totox values, all brand oils were above the recommended limit (30 Meq/Kg oil) from the outset of storage (0 months), while Sesame Factory oil adhered to the specifications.
Key word: storage period, quality parameters, Brand oils, SSMO
