Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10554456 | Journal of Pharmaceutical and Biomedical Analysis | 2005 | 5 Pages |
Abstract
A simple method for the simultaneous determination of Cd and Pb in medicinal plants by differential pulse anodic stripping voltammetry, using a hanging mercury drop electrode, was developed. The pre-concentration of the metals was performed in 0.8 mol Lâ1 HCl at â0.73 V for 180 s. The sample preparation was carried out by dry-ashing 1.0 g of finely pulverized plant samples for 2.5 h at 500 °C. The determination limit of the method was 0.12 and 0.010 mg kgâ1 for Pb and Cd, respectively. The method was applied to the quantification of cadmium and lead in samples of Hypericum perforatum, Mikania guaco, Mikania glomerata and Peamus boldus. The voltammetric method was shown to be useful for the control of contaminants in medicinal plants.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Mónica Cecilia Vargas Mamani, Luiz Manoel Aleixo, Mônica Ferreira de Abreu, Susanne Rath,