Abstract
The clay mineral montmorillonite has been tested as modifier for the carbon paste electrode with a novel electrode modification technique. The differential pulse voltammetric determination of copper(II) by means of this modified carbon paste electrode has been studied. A detection limit of 4×10-8 mol/l has been achieved after 10 min preconcentration under open circuit conditions with subsequent anodic stripping voltammetry. The calibration curve for Cu(II) is linear in the range of 4×10-8–8×10-7 mol/l. Pb interferes in a 10-fold molar and Cd and Hg in a 100-fold molar excess. The interference by humic ligands is significant.
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Kula, P., Navrátilová, Z. Voltammetric copper(II) determination with a montmorillonite-modified carbon paste electrode. Fresenius J Anal Chem 354, 692–695 (1996). https://doi.org/10.1007/s0021663540692
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DOI: https://doi.org/10.1007/s0021663540692