Investigation Of The Levels Of Selected Metals In The Leaves Of Thyme (t. Schimperi And T. Vulgaris) Grown In Ethiopia

The contents of some selected metals Ca, Mg, Fe, Mn, Zn, Ni, Cu, Co and Cdrnin different thyme leaf samples readily consumed in Ethiopia wererndetermined by flame atomic absorption spectroscopy (FAAS) after acidrndigestion with 1:1 HNO3/HClO4 for 3 h at a temperature of 240 0C by arnKjeldahl apparatus hot plate digester. The level of the nutrients in the fourrnsamples ranged from 1239 – 2517 μg/g, Ca; 1524 – 1786 μg/g, Mg; 728 –rn2517 μg/g, Fe; 37.7 – 114 μg/g, Mn; 8.7 – 52 μg/g, Zn; 9.83 – 14.2 μg/g, Ni;rn7.69 – 9.3 μg/g, Cu; 2.59 – 4.3 μg/g, Co; and 0.87 – 1.3 μg/g, Cd;rnrespectively. The concentration of Ca was higher than the other metals inrnthe three samples and Cd was the least of all the metals in the analyzedrnsamples. The over all reproducibility of the method obtained from spikingrnexperiment was with in the range ± 10 % except for Fe (± 11.91 %), Cd (±rn10.89 %) and Co (± 10.84 %). This result will complement available data onrnfood composition in Ethiopia.rnKey words: Thyme leaves, Metals, Debresina, Wondogenet, Ethiopia, FAAS.

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