Voltammetric Determination of 1-Nitropyrene and 1-Aminopyrene at a Boron-Doped Diamond Film Electrode
O. Yosypchuk
Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Prague
K. Pecková
Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Prague
J. Barek
Charles University, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Prague
Abstrakt
Optimum conditions for the determination of carcinogenic 1-nitropyrene (NP) and 1-aminopyrene (AP) by differential pulse voltammetry with a boron-doped diamond film electrode were found − aqueous-methanolic (3:7) Britton-Robinson buffer (pH 3), scan rate 20 mV s−1, pulse duration 100 ms, pulse amplitude −50 mV (NP) and 50 mV (AP). The regeneration in NP determination was carried out before analysis by switching fifty-times between the potentials 800 mV and −500 mV every 0.3 s. In determination of AP, no regeneration was needed. The limits of quantification were 8•10−7 and 2•10−7 mol dm−3 for NP and AP, respectively.
