Voltammetric Determination of Triclosan Using a System of Disposable Electrochemical Cells with Integrated Carbon Electrode

Page: 243

M. Libánský, J. Zima, J. Barek, and H. Dejmková

Charles University in Prague, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Faculty of Science, University Research Centre UNCE “Supramolecular Chemistry”, Prague


Optimum conditions were found for the determination of Triclosan, an environmental pollutant, by differential pulse voltammetry using a system of two types of new disposable electrochemical cells with integrated carbon composite film electrode. Concentration dependences were measured in a mixture of a buffer of pH 7 and methanol (9:1, V/V). The calculated Triclosan quantification limits were 1.64 and 0.85 ??????mol dm–3 for carbon-polystyrene (PS) and carbon-polycarbonate (PC) composite electrodes, respectively. The attempt to increase the sensitivity of the determination by adsorptive accumulation of Triclosan was not successful. The method was verified by the determination in a toothpaste using extraction. Concentration of the analyte was determined by the standard addition me¬thod. In the case of C-PS electrode, very good repeatability of the measurements was found. In the case of C-PC electrode, lower results and a worse repeatability were observed.


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