Preconcentration and Voltammetric Determination of Nitro Compounds on Carbon-Paste Electrodes

Carbon-paste electrodes modified with liquid phases of different polarities were proposed for the voltammetric determination of organic nitro compounds. The conditions for the selective preconcentration of aromatic nitro compounds were studied along with their voltammetric behavior on carbon-paste electrodes. The dependence of the concentration factor on the nature of binding agents was revealed. The effect of adsorption and extraction processes on peak reduction currents of nitro compounds was studied. It was shown that nitrophenols can be selectively determined on the carbon-paste electrodes under study.