Article Sidebar
Article Details
In accordance with the Copyright Act of 1976, which became effective January 1, 1978, the following statement signed by each author must accompany the manuscript submitted: "I, the undersigned author, transfer all copyright ownership of the manuscript referenced above to the Nigerian Journal of Technological Development, in the event the work is published. I warrant that the article is original, does not infringe upon any copyright or other proprietary right of any third party, is not under consideration by another journal, and has not been published previously. I have reviewed and approve the submitted version of the manuscript and agree to its publication in the Nigerian Journal of Technological Development." A copyright transfer form may be downloaded from the NJTD Website (http://njtd.com.ng/index.php/njtd). Author(s) will be consulted, whenever possible, regarding republication of material. All authors must have access to the data presented and the authors and sponsor (if applicable) must agree to share original data with the editor if requested.
Main Article Content
EFFECTS OF EXTRACTION METHODS ON PHYSICO-CHEMICAL PROPERTIES OF OIL FROM CASHEW NUTS (Anarcardium occidentale)
Abstract
With a view to studying the.impact of methods of extraction on properties of oil from cashew.nuts,. two extraction 'methods were adopted to obtain oils from cashew nuts. The methods are solvent extraction using n-hexane as extractive· solvent and traditional· hydraulic press. methods.The physico-chemical properties of the extracted oil samples were analyzed and compared to each other .. Percentage oil yields .were 53.25% and 46.89% for the solvent extracted·an4 hydralic· pressrqils; respectively. The oil sample's odour· was not offensive at 'room. temperature, for either· m,ethod. Specific gravity was 0.86g/kg for solverit extracted oil and 0.94g/kg for oil obtained through hydraulic press. Saponification value ranged from 85.S.g/kg for hydraulic·press oil to 96.62 g/kgS<>r solvent extracted oil. pH values for both samples were below 7 .0, and the' refractive index forboth. samples was 1.47. The relative density value ranged from 0.9 to 0.92 at 29°C (room temperature). Both oil samples were in liquid state at room temperature and boiling points varied from 94°C-to 98°C for solvent extracted oil and hydraulic press oil respectively. The results showed thatJhe method ofextraction imposed significant changes on specific gravity, saponificatiori.value, iodi.rie value, acid value, peroxide value and relative density. However, no significant differences were recorded in parameters like free fatty acid, peroxide value and refractive index values.
Key words: Cashew nut, Solvent extraction, Hydraulic press,' Physico-chemical properties
