Determination of 2-Nitrophenol, 4-Nitrophenol, 2-Methoxy-5-nitrophenol, and 2,4-Dinitrophenol by Differential Pulse Voltammetry and Adsorptive Stripping Voltammetry

Abstract

The behaviour of the title substances, which are components of the commercial plant growth stimulator Sviton, in differential pulse voltammetry at a hanging mercury drop electrode was studied and the optimum conditions were established for their quantitation over the concentration region of 1 .10-7 to 1 .10-5 mol l-1. Additional decrease in the limit of determination was achieved in adsorptive stripping voltammetry, by which 4-nitrophenol and 2-nitrophenol can be determined within the concentration regions of 2 .10-10 to 1 .10-7 and 2 .10-8 to 1. 10-7 mol l-1, respectively, and 2,4-dinitrophenol and 2-methoxy-5-nitrophenol within the region of 2 .10-9 to 1 .10-7 mol l-1.