Browsing by Author "Leshe Kitaw, Sintayehu"

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    Determination of The Levels of Trace Metals in Ethiopian Landrace Lentils (Lens Culinaris Medik)
    (Addis Ababa Universty, 2010-06) Leshe Kitaw, Sintayehu; Tessema, Merid (PhD)
    The concentrations of trace essential metals (Co, Cu, Fe, Mn, Ni, and Zn) and toxic heavy metals (Cd, Pb) in the Ethiopian landrace lentil samples were determined by using flame atomic absorption spectrometry. A wet digestion procedure, using mixtures of HNO3, HClO4 and H2O2, was developed for the decomposition of powdered lentil samples. The accuracy of the method was checked by the standard addition method. The contents of the analyzed heavy metals ranged between 0.009 and 0.013 for Cd, 0.285 and 0.360 for Co, 0.226 and 0.282 for Cu, 9.17 and 11.91 for Fe, 6.7 and 8.2 for Mn, 0.120 and 0.244 for Ni, 0.142 and 0.176 for lead and 8.62 and 10.03 for Zn, all in mg/100 g. The results were compared with values reported in the literature. Keywords: lentil, atomic absorption spectrometry, wet digestion, mineral nutrition, toxic metals, legumes.