Determination Of Some Selected Metals In Peanut (arachis Hypogaea L.) Seed Samples Collected From Three Different Areas Of Ethiopia Using Flame Atomic Absorption Spectrophotometry (faas)

Peanut (Arachis hypogaea L.) is an important legume oilseed. Peanut is mainly used to makernoils and can be consumed directly (roasted and salted) or processed into oil or cake. Peanut isrnnutrient rich source of protein, fat, vitamin and minerals. The main objective of this study was torndetermine some selected metals in peanut seeds cultivated in three different areas in Ethiopia.rnThe peanut seed samples were collected from Babile (Oromia region), Dibate (BenishangulrnGumuz region) and Zala Mela (SNNP) of Ethiopia. After the pretreatment, the samples wererndigested for optimized volume of reagent, temperature and time. FAAS was used to determine thernmetals. The accuracy of the optimized procedure was evaluated by analyzing the digestion ofrnspiked samples with standard solution and percentage recoveries varied from 90.5 to 98. Thernconcentration of metals in peanut seed samples were in the following range. Ca (48.4-83.4), Fern(9.3-11.3), Mn (3.15-7.3), Na (784.7-1146), Pb (1.59-1.96) and Zn (12.2-19.3) mg/kg,rnrespectively. The concentration of Cd, Cu and Ni is below detection limit. ANOVA indicated thatrnthere is no significant difference between the mean concentrations of Fe among the peanut seedrnsamples at 95% confidence. There is good correlation between Na-Ca, Mn-Na, Fe-Ca, Mn-Carnand Mn-Fe. Poor correlations were observed between Fe-Zn, Mn-Zn, Pb-Fe and Zn-Ca.

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