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Trace elements like Mn, Fe, Cu, Zn and major elements K and Ca were quantified in ten selected medicinal plants of North East India by using Proton Induced X- ray Emission (PIXE) technique. No toxic heavy metals such as As, Hg, Pb and Cd were detected. The concentration (ppm) of the elements in the studied plants was found to be as follows: manganese(10 to1800 ), iron(27 to 836), copper(6 to140), zinc(10 to 160), potassium(14120 to 76950) and calcium(1660 to 32030). The levels of trace metals present in the plants was found to be beyond the safety standards of WHO in edible plants but around the permissible range for consumed medicinal herbs as defined for different countries.

Profile of Trace Elements in Selected Medicinal Plants of North East India