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Mineral Composition, Physicochemical Properties and Fatty Acids Profile of Citrullus Vulgaris Seed Oil

Author Affiliations

  • 1 Department of Chemistry, Ahmadu Bello University, P.M.B. 1044, Zaria, NIGERIA
  • 2 Department of Pure and Applied Chemistry, Usman Danfodio University, SOKOTO
  • 3 Department of Pure and Applied Chemistry, Kebbi State University of Science and Technology, Aliero, NIGERIA

Res.J.chem.sci., Volume 4, Issue (6), Pages 54-57, June,18 (2014)


Soxhlet extraction (using n-hexane) of the oil from sun-dried and crushed seed of citrullus vulgaris gave yellow colour oil with a yield of 27 % oil per 100 g of the seeds.The fatty acids profile was obtained using gas chromatography mass spectroscopy (GC-MS), physicochemical properties were determined using standard methods and atomic absorption spectrophotometer (AAS) was used to obtain the concentrations of Fe, Ca, K, Mg and Na. The fatty acid profile revealed four compounds with linoleic acid (76.24 %) and Palmitic acid (14.42 %) as predominant compounds, while stearic acid (9.01 %) and oleic acid (0.33 %) were low. Physicochemical properties of the oil were determined as follows Specific gravity (0.864), colour (light yellow), Iodine value (58.54 g/100g oil), peroxide value (10 meq/g), acid value 9.58 mgKOH/g and texture at 37C. These are very vital in considering the oil quality. Also, saponification value of 255.26 mgKOH/g was obtained in this study thereby confirmed its industrial applications. In order to understand the chemistry of it’s industrial applications,thispaper reports some selected mineral compositions, fatty acid content and other important properties of the extracted seed oil.


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