Determination of 2,4,6-TRICHLOROPHENOL in Beverages Using Voltammetry: Optimization and Validation Studies

This paper describes the optimization and in house validation of an electroanalytical method for the determination of 2,4,6-trichlorophenol (2,4,6-TCP) in beverages for the first time. Cyclic voltammetry and square wave voltammetry techniques, 0.1 mol L−1 Britton–Robinson buffer (pH 8.0) and boron-doped diamond electrode were used for this purpose. The system was optimized and the obtained analytical curves presented good linearity in the concentration range investigated; moreover, the linear model did not present a lack-of-fit. The limits of detection and quantification (0.15 μmol L−1 and 0.46 μmol L−1, respectively) of the used method were low. In addition, this method presented good accuracy and precision (recovery rates between 90.0% and 118.0% and relative standard deviation values in the range of 0.74% to 1.51%). Thus, it was suggested that the developed electroanalytical method could be used for the determination of 2,4,6-TCP in beverages and presented advantages, such as speed, low cost, and low consumption of toxic reagents, compared with traditional methods.