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THE EFFECTS OF DRYING TEMPERATURES ON SOME PHYSICOCHEMICAL PROPERTIES OF EXTRACTED TIGER NUT (CYPERUS ESCULENTUS) OIL
Oyedele O. A.*, and Ogunnaike A. F.
Oil extractions from agricultural grains or nuts are usually preceded with roasting or drying. The temperature of drying/roasting needs to be monitored in order to obtain quality oil. This study was carried out to examine the effect of different drying temperature on some physicochemical properties of oil from Tiger nut (Cyperus esculentus). Fresh Tiger nuts were obtained from Oja-Oba market at Ado-Ekiti. The nuts were weighed and sorted out to obtained good and matured samples. The samples were dried at different drying temperature of 50, 55, 60, 65 and 700C, after which they were milled and oil was extracted using solvent method. Some physicochemical analysis carried out on the oil obtained from the samples. The data were presented on scattered line graph using excel package. The result indicated that most moisture content, saponification value, acid value, free fatty acid (FFA) and preoxide decreases as the temperature increases. The pH and the refractive index were not affected with temperature variation.[Full Text Article]