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Electroanalysis Of Copper Species At Polypyrrole-modified Electrodes Bearing Alizarin Red S Ligands

K. Shiu, O. Chan
Published 1995 · Chemistry

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Abstract Conducting polymer modified electrodes based on the incorporation of the anionic complexing ligand alizarin red S into polypyrrole (Ppy) film during electropolymerization were applied to the electroanalysis of metal species including Cu + and Cu 2+ . The copper species were readily extracted into the Ppy film electrode containing the complexing ligands and were determined electrochemically. The sensitivity for determination of Cu 2+ species was significantly better than that for Cu + species at much lower concentrations despite a smaller complex stability, but suffered from a very limited linear region. The results also showed that the ligand-to-metal ratios for complex formation at the Ppy film were concentration dependent.
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