Differential Pulse Voltammetric Determination of 2-Methyl-4,6-Dinitrophenol using Bismuth Bulk Electrode
2020
Abstract
This work reports the application of bismuth bulk electrode (BiBE) for the determination of 2-methyl-4,6-dinitrophenol (MDNP) by differential pulse voltammetry (DPV) in Britton-Robinson buffer of pH 12.0 as an optimal medium. BiBE was prepared by transferring molten bismuth into a glass tube under constant stream of nitrogen.
The linear concentration dependences were measured from 1 to 10 mu mol. L-1 and from 10 to 100 mu mol.
L-1 by using optimum accumulation potential of -0.7 V and optimum accumulation time 30 s. Under these conditions limit of determination and limit of quantification was 0.45 and 1.5 mu mol.
L-1, respectively. The developed method was successfully applied for the analysis of tap water as a model sample.