Determination of 2-nitrophenol using carbon film electrode
This study is focused on the application of a carbon film electrode for the determination of micromolar concentrations of pesticide 2-nitrophenol using modern voltammetric methods. For the determination of 2-nitrophenol, direct current (DCV) and differential pulse (DPV) voltammetry were chosen. The following optimal conditions for the determination of 2-nitrophenol were found: Britton-Robinson buffer of pH 5.0 for DCV and pH 6.0 for DPV, and the regeneration potential cycles (E (in) = 0 mV, E (fin) = 0 mV). Under these conditions, limit of quantification was found to be 1.2 x 10(-6) mol dm(-3) for DCV and 2.0 x 10(-6) mol dm(-3) for DPV in deionized water. The limit of quantification for model samples of drinking water was 3.0 x 10(-7) mol dm(-3) for DCV and 1.0 x 10(-6) mol dm(-3) for DPV. The applicability of carbon film electrode for the determination of micromolar concentrations of 2-nitrophenol based on cathodic reduction of present nitro group and in model samples of drinking water was confirmed. [GRAPHICS] .