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