Collect. Czech. Chem. Commun.
1990, 55, 379-390
https://doi.org/10.1135/cccc19900379
The polarographic and voltammetric determination of 2,6-dichloro-4-nitro-2'-acetylamino-4'-diethylaminoazobenzene
Jiří Bareka, Dagmar Civišováa, Ashutosh Ghoshb and Jiří Zimaa
a Department of Analytical Chemistry, Charles University, 128 40 Prague 2, Czechoslovakia
b Department of Inorganic Chemistry, Indian Association for Cultivation of Science, Calcutta - 700 032, India
Abstract
The polarographic reduction of the title azo dye has been studied, a mechanism has been proposed and optimal conditions have been found for its analytical use. The detection limit using a classical dropping mercury electrode was 2 . 10-7 mol l-1 for TAST polarography and 1 . 10-8 mol l-1 for differential pulse polarography. Using a hanging mercury drop electrode, the detection limit was 9 . 10-9 mol l-1 for fast scan differential pulse voltammetry and 1 . 10-8 mol l-1 for linear scan voltammetry. Adsorption accumulation of the test substance on the surface of the hanging mercury drop electrode led to a further decrease in the detection limit to 1 . 10-9 mol l-1 for fast scan differential pulse voltammetry and 7 . 10-10 mol l-1 for linear scan voltammetry.
