Bekele, Dereje (2008) Determination of Levels of Major, Minor and Trace Elements in Ethiopian Ouzo Alcoholic Beverage. Masters thesis, Addis Ababa University.
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PDF (Determination of Levels of Major, Minor and Trace Elements in Ethiopian Ouzo Alcoholic Beverage)
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Abstract
Alcoholic beverages are any fermented or distilled liquids such as wine, beer, whisky, ouzo, gin, etc. Ouzo is one type of distilled alcoholic beverage with alcoholic content of 40 to 43 % flavored by anethole extracted from anise, star anise or fennel plant. In this study the concentration of selected metals (Na, Ca, Mg, Fe, Zn, Mn, Co, Cr, Pb, Cu, Ni and Cd) in different Ethiopian ouzo brands (Kokeb, National, Liyu Addis, Victoria and Belezaf) sampled from different supermarket in Addis Ababa were analysed. Known volume of ouzo samples were digested by using 2 mL of H2NO3 and 5 mL of H2O2 for 90 minutes at a temperature of 180 C0. The levels of the minerals in the digested ouzo samples were analyzed by using flame atomic absorption spectrometer. The following result were recorded in g/L for each five ouzo brands Na (18194 - 8529), Ca (8330 - 12830) , Mg (1345 – 10977), Fe (942 – 2881), Zn (642 - 2215), Cu (ND<20 - 212), Mn (15 - 225), Cr (54 - 121), Co (ND<50 - 130). Both Ni (<40) and Cd (<5) are below the detection limit of the instrument in all ouzo brands analyzed. The level of Na is the highest in all brands followed by Ca and Mg respectively except for Kokeb ouzo in which the concentration of Mg is higher than Ca. From trace elements analyzed, Zn was found to be highest next to Fe followed by Mn and Co. Generally the levels of metals are higher in Liyu Addis ouzo compared to other brands. All brands are free of heavy metals (Ni and Cd) and contain Pb, Cr and Co in lesser amount.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Ouzo, FAAS, Major, Minor, Heavy, Elements, Flavor, Alcohol, Beverage, Anethole |
| Subjects: | Q Science > Q Science (General) Q Science > QD Chemistry |
| Divisions: | Africana |
| Depositing User: | Selom Ghislain |
| Date Deposited: | 02 Oct 2018 11:09 |
| Last Modified: | 02 Oct 2018 11:09 |
| URI: | http://thesisbank.jhia.ac.ke/id/eprint/5871 |
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