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