Determination of lead, cadmium and zinc applying the Stripping analysis on biomass of natural grasslands
2011
Babincev, Lj. M., Faculty of Technical Sciences, Kosovska Mitrovica (Serbia) | Rajaković, Lj.V., Faculty of Technology and Metallurgy, Belgrade (Serbia) | Budimir, M.V., Faculty of Natural Science, Kosovska Mitrovica (Serbia) | Sredović, I., Faculty of Agriculture, Belgrade - Zemun (Serbia)
This study is focused on mechanisms of voltammperometric determination of lead, cadmium and zinc in the natural grassland biomass in territory of northern Kosovo, applying the Stripping analysis. Two types of determinations have been researched: individual and simultaneous research of all three metals. The preliminary researches had been conducted prior determinations on real samples defining the determination conditions: extraction potential, value of analyzed pH solution, metal extraction time, time for creating of working electrode, as well as solution mixing velocity. It was found that, with accuracy of +/- 2%, determinations were done for 22-900 micro g/cubic dm of lead, 16-960 micro g/cubic dm of cadmium and 18-750 micro g/cubic dm of zinc. The simultaneous metal determinations had less accurate results for lead and cadmium, whereas they ranged within accuracy limits for zinc. Heavy metal determination in biomass indicated existence of lead, cadmium and zinc in natural grasslands in northern parts of Kosovo and Metohija.
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