Collect. Czech. Chem. Commun.
1985, 50, 712-725
https://doi.org/10.1135/cccc19850712
Polarography of N,N-dimethyl-4-amino-4'-hydroxyazobenzene in water-methanol mixtures
Jiří Barek and Lubomír Kelnar
Department of Analytical Chemistry, Charles University, 128 40 Prague 2
Abstract
The polarographic reduction of N,N-dimethyl-4-amino-4'-hydroxyazobenzene in water-methanol medium was investigated. Evidence is presented for adsorption of the depolarizer on the electrode, and a reduction mechanism is proposed. Conditions are indicated for the determination of this compound in the concentration range 10-4-10-6 mol/l by d.c. polarography, 10-5 to 3 . 10-7 mol/l by Tast polarography, and 10-5-3 . 10-8 mol/l by differential pulse polarography.
