Determination Of Some Major And Trace Metals Levels In Korarima (aframomum Corrorima) Cultivated In The Southern And Southwestern Ethiopia

In this study, the concentration levels of major (Ca and Mg), trace (Fe, Zn, Cu,rnCo, Cr, Mn, and Ni), and toxic (Cd and Pb) metals were determined in korarimarn(Aframomum corrorima) samples collected from southern and southwesternrnEthiopia. The results were compared with the metal levels in the soil collectedrnfrom the same area as korarima sample. A wet digestion procedure involving thernuse of 3 mL of HNO3 (69-72%) and 1 mL of HClO4 (70%) and modified aqua regiarn(HCl:HNO3, 3:1) with hydrogen peroxide (6 mL of aqua regia and 1.5 mL ofrnH2O2) were used to solubilize metals from the korarima and soil samples,rnrespectively. Flame atomic absorption spectrometry was used to quantify thernmetals levels. The validity of the procedure was checked by spiking experimentsrnand the recovery value ranges from 88 to 109% for korarima and from 89 to 104%rnfor soil samples. Calcium and iron were found to be the highest metalsrndetermined in korarima and soil samples, respectively. Manganese is the mostrnaccumulated trace metal in korarima seed samples analyzed and the secondrnmost accumulated trace metal in the soil next to iron. The concentration ofrncadmium was within the range 0.9-1 μg/g dry wt in korarima samples. The levelrnof lead in the korarima samples was below the method detection limit.rnKey words: Korarima (Aframomum corrorima), Soil, Wet digestion, FAAS,rnEthiopia.

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