The Chapeu-de-couro (Echinodorus macrophyllus (Kunth) Micheli) is a native plant from Brazil, which has been mainly used in medicinal application being a potent antirheumatic and diuretic, in the production of soft drinks, and also in the ornamentation of aquariums. In this paper, the metals and metalloids for the leaves of chapeu-de-couro collected in the Paraguacu River from the city Cachoeira, Bahia State, Brazil, was determined and evaluated using multivariate analysis. The samples were digested using nitric acid and hydrogen peroxide and were analyzed using inductively coupled plasma mass spectrometry. The accuracy of the method was confirmed by analysis of a certified reference material of apple leaves, furnished by National Institute of Standard and Technology. The study involved 15 samples of the Paraguacu River. The results expressed as milligrams of element per kilogram of sample demonstrated that the concentration ranges varied: 1.39–5.27 for chromium, 44.85–165.39 for manganese, 0.55–0.84 for arsenic, 0.01–3.94 for antimony, and 0.18–0.31 for lead. The principal component analysis and hierarchical cluster analysis evidenced that the concentrations of the metals and metalloids varied according with the variations in the water of the Paraguacu.
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The authors are grateful to the Fundação de Amparo à Pesquisa do Estado da Bahia, the Conselho Nacional de Desenvolvimento Científico e Tecnológico, and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior for providing grants, fellowships, and other financial support.
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Barbosa, U.A., dos Santos, I.F., dos Santos, A.M.P. et al. Determination and Evaluation of the Metals and Metalloids in the Chapeu-de-couro (Echinodorus macrophyllus (Kunth) Micheli). Biol Trace Elem Res 154, 412–417 (2013). https://doi.org/10.1007/s12011-013-9730-8
- Metals and metalloids