Electrochemical Reduction as a Powerful Tool to Highlight the Possible Formation of By-Products More Toxic Than Sudan III Dye
Loading...
External sources
External sources
Date
Advisor
Coadvisor
Graduate program
Undergraduate course
Journal Title
Journal ISSN
Volume Title
Publisher
Electrochemical Science Group
Type
Article
Access right
Acesso aberto
External sources
External sources
Abstract
The present work describes the electrochemical reduction of the azo dye Sudan III in methanol/0.01 mol l(-1) Bu4NBF4 at applied potential of -1.2V, which promotes 98% discoloration of the commercial sample. The reduction products were analyzed by high performance liquid chromatography, after optimized conditions for 20 aromatic amines with carcinogenic potentiality. The harmful compounds such as: aniline, benzidine, o-toluidine, 2,6-dimethylaniline, 4,4'-oxydianiline, 4,4'-metileno-bis-2-methylaniline and 4-aminobiphenyl are formed after azo bond cleavage. The electrochemical reduction is compared with chemical reduction by using sodium thiosulfate. Our findings illustrates that commercial Sudan III under reductive condition can forms a number of products, which some are known active genotoxins. The technique could be used to mimic important redox reactions in human metabolism or environment, highlighting the possible formation of by-products more toxic than the original dyes.
Description
Keywords
Aromatic amines, sub products, electrochemical reduction, HPLC, Sudan dyes
Language
English
Citation
International Journal of Electrochemical Science. Belgrade: Electrochemical Science Group, v. 7, n. 9, p. 7784-7796, 2012.
