Actas de congresos
Electrochemical reduction of azo-based chlorotriazine reactive dyes
Fecha
1997-01-01Registro en:
Proceedings of the Symposium on Chemical and Biological Sensors and Analytical Electrochemical Methods. Pennington: Electrochemical Society Inc., v. 97, n. 19, p. 467-476, 1997.
WOS:A1997BJ30V00057
0000-0002-2296-1393
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The reduction process of the azo dyes reactive red 120 and reactive green 19 was investigated in B-R buffer pH 2-12 by differential pulse polarography, cyclic voltammetry and controlled potential electrolyse. The reactive red 120 presents two azo groups reducible in a single step of 8 electrons followed by simultaneous reduction of the two clorotriazine groups. The reduction of reactive green 19 is complicated by the presence of azo groups and chlorotriazine moyeties in a non symmetrical molecule. The peaks can be monitored for dyes determination in concentration level up to 1x10(-7) mol/L and 1x10(-9) mol/L using differential pulse polarography or cathodic stripping voltammetry.