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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/2540

Title: DETERMINATION OF TRACE LEVELS METALS SOME MAJOR IN AND KORARIMA (AFRAMOMUM CORRORIMA) CULTIVATED IN SOUTHERN AND SOUTHWESTERN ETHIOPIA
Authors: BIRHANU, MEKASSA
Advisors: PROF. B. S. CHANDRAVANSHI
Keywords: Ethiopia.
FAAS
Wet digestion
Soil
Korarima (Aframomum corrorima)
Copyright: Jul-2010
Date Added: 4-May-2012
Publisher: AAU
Abstract: In this study, the concentration levels of major (Ca and Mg), trace (Fe, Zn, Cu, Co, Cr, Mn, and Ni), and toxic (Cd and Pb) metals were determined in korarima (Aframomum corrorima) samples collected from southern and southwestern Ethiopia. The results were compared with the metal levels in the soil collected from the same area as korarima sample. A wet digestion procedure involving the use of 3 mL of HNO3 (69-72%) and 1 mL of HClO4 (70%) and modified aqua regia (HCl:HNO3, 3:1) with hydrogen peroxide (6 mL of aqua regia and 1.5 mL of H2O2) were used to solubilize metals from the korarima and soil samples, respectively. Flame atomic absorption spectrometry was used to quantify the metals levels. The validity of the procedure was checked by spiking experiments and the recovery value ranges from 88 to 109% for korarima and from 89 to 104% for soil samples. Calcium and iron were found to be the highest metals determined in korarima and soil samples, respectively. Manganese is the most accumulated trace metal in korarima seed samples analyzed and the second most accumulated trace metal in the soil next to iron. The concentration of cadmium was within the range 0.9-1 μg/g dry wt in korarima samples. The level of lead in the korarima samples was below the method detection limit.
URI: http://hdl.handle.net/123456789/2540
Appears in:Thesis - Chemistry

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