Collect. Czech. Chem. Commun. 1989, 54, 1538-1548

The polarographic and voltammetric determination of semitrypane blue

Jiří Bareka, 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


The polarographic reduction of the azodye semitrypane blue has been studied, a mechanism has been proposed and optimal conditions have been found for the determination of this substance by TAST polarography (to 2.10-6 mol l-1) and differential pulse polarography (to 1.10-7 mol l-1) at a classical dropping mercury electrode and by fast scan differential pulse voltammetry (to 1.10-8 mol l-1) and linear scan voltammetry (to 1.10-8 mol l-1) at a hanging mercury drop electrode. The detection limit was decreased to 1.10-9 mol l-1 for fast scan differential pulse voltammetry and 1.10-10 mol l-1 for linear scan voltammetry by using adsorptive accumulation of the determined substance at the hanging mercury drop electrode.