Browsing by Author "Zigde, Melaku"

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    Determination of the levels of Selected Essential and Toxic Metals in Canned Tomato Paste
    (Addis Ababa Universty, 2009-07) Zigde, Melaku; Tessema, Merid (PhD)
    In this study, a reliable digestion procedure for the analysis of tomato paste was optimized and levels of selected essential metals (Zn, Fe, Cu and Mn) and toxic metals (Pb and Cd) were determined in four tomato paste of local origins using Atomic Absorption Spectrometry. The results showed that the zinc concentration in the four tomato paste examined ranged between 2.54 – 6.63 mg Kg-1, iron between 63.11 – 96.10 mg Kg-1, copper 6.95 mg Kg-1, manganese between 11.5 – 23.02 mg Kg-1, and cadmium between 0.511 – 1.22 mg Kg-1. The results are also compared with International Standards. The cadmium content obtained showed that the level is higher than the FAO/WHO limits. Key words: Tomato paste, metals, Flame Atomic Absorption Spectrometry