Derbie, Awraris (2009) Investigation of the Levels of Selected Metals in the Leaves of Thyme (T. schimperi And T. vulgaris) Grown in Ethiopia. Masters thesis, Addis Ababa University.
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Abstract
The contents of some selected metals Ca, Mg, Fe, Mn, Zn, Ni, Cu, Co and Cd in different thyme leaf samples readily consumed in Ethiopia were determined by flame atomic absorption spectroscopy (FAAS) after acid digestion with 1:1 HNO3/HClO4 for 3 h at a temperature of 240 0C by a Kjeldahl apparatus hot plate digester. The level of the nutrients in the four samples ranged from 1239 – 2517 µg/g, Ca; 1524 – 1786 µg/g, Mg; 728 – 2517 µg/g, Fe; 37.7 – 114 µg/g, Mn; 8.7 – 52 µg/g, Zn; 9.83 – 14.2 µg/g, Ni; 7.69 – 9.3 µg/g, Cu; 2.59 – 4.3 µg/g, Co; and 0.87 – 1.3 µg/g, Cd; respectively. The concentration of Ca was higher than the other metals in the three samples and Cd was the least of all the metals in the analyzed samples. The over all reproducibility of the method obtained from spiking experiment was with in the range ± 10 % except for Fe (± 11.91 %), Cd (± 10.89 %) and Co (± 10.84 %). This result will complement available data on food composition in Ethiopia.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Thyme leaves, Metals, Debresina, Wondogenet, Ethiopia, FAAS.33. F. Ozkutulu, N. Sekeroglu and S. Metinkara, Monitoring of cadmium and micronutrients in spices commonly consumed in Turkey, Res. J. Agr. and Bio. Sci., 2006, 2(5), 223 – 226. 34. J. Medved, V. Stresko, J. Kubova, E. Chmielewska, Evaluation of atomic absorption spectroscopy methods for determination of some heavy metals in soils, soil extracts, plants, and biota. Chem. Pap., 2003, 57(3), 169 – 171. 35. B. Skrbic, S. Cupic, J. Evejanov, Determination of heavy metals in beet sugar samples from Vojovodina province, J. Env. Protection and Ecology, |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry Q Science > QK Botany |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 10 Sep 2018 13:00 |
| Last Modified: | 10 Sep 2018 13:00 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/5029 |
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