Trace elements (Mn, Fe, Cu, and Zn) and heavy metals (Pb and Cd) contents were determined in leaves of medicinal plants: plantain (Plantago lanceolata), birch (Betula verrucosa) and herb of nettle (Urtica dioica) harvested in two vegetation periods: 2003 and 2004 in Branica Radzyńska (Lublin region), with the use of AAS technique. The lowest lead concentration was found in plantain leaves harvested in 2003 (0.56 mg∙kg-1 DM) and nettle herb from both periods (0.6–0.9 mg∙kg-1 DM. The highest lead contents, much exceeding permissible level of 2.0 mg∙kg-1 DM were recorded in birch leaves: 9.8 mg∙kg-1 DM in 2003 and 5.7 mg∙kg-1 DM in 2004. Nettle herbs harvested in 2004 and birch leaves collected in 2003 appeared to be largely contaminated with cadmium (0.43 mg∙kg-1 DM each), which was slightly beyond permissible limit (0.3 mg∙kg-1 DM). Trace elements contents as well as lead and cadmium depended on harvest date and plant species.
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