Collect. Czech. Chem. Commun. 1991, 56, 1210-1220

The determination of N,N-dimethyl-4-aminoazobenzene and its reduction products by anodic voltammetry at a glassy carbon electrode

Jiří Bareka, Tibor J. Pastorb and Jiří Zimaa

a Department of Analytical Chemistry, Charles University, 128 40 Prague 2, Czechoslovakia
b Department of Analytical Chemistry, Belgrade University, 110 01 Belgrade, Yugoslavia


The oxidation of N,N-dimethl-4-aminoazobenzene at a rotating and stationary glassy carbon disk electrode in a medium of 40% (v/v) acetic acid was studied in the framework of a systematic study of methods for determing the efficiency of the destruction of the genotoxic derivatives of this substance; conditions were found for the determination using direct current and differential pulse voltammetry. Analogous conditions were used to determine aniline, N,N-dimethylaniline and N,N-dimethyl-p-phenylendiamine as model substances representing possible products of the reductive splitting of genotoxic azocompounds. The determination limit of the method is less than 1 . 10-5 mol l-1 and its selectivity is completely satisfactory for controlling the efficiency of the destruction.