Electrochemical behavior of metribuzin on a glassy carbon electrode in an aqueous medium including quantitative studies by anodic stripping voltammetry

The electrochemical behavior of the herbicide metribuzin was studied in an aqueous solution on glassy carbon, carbon paste/Nujol oil and carbon paste/castor oil using cyclic voltammetry, square-wave voltammetry, differential pulse voltammetry, controlled-potential coulometry and electrolysis, for quantification and decontamination purposes. The main electrolytic products obtained from the reduction of metribuzin, after consumption of 8.26 mol electron mol-1, were deaminometribuzin and diketometribuzin. The anodic wave observed after electroreduction is associated with the oxidation of the methylthiolate generated in the electrolytic process. This wave was used to quantitatively determine metribuzin in a commercial sample by anodic stripping voltammetry. The electro-Fenton method was employed to promote decontamination by eliminating the herbicide, resulting in 80% of mineralization of the metribuzin.

Bibliographic Details

Main Authors:	Lima,Augusto César de Andrade, Silva,Emanuella Gomes da, Goulart,Marília Oliveira Fonseca, Tonholo,Josealdo, Silva,Tiago Terto da, Abreu,Fabiane Caxico de
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Química 2009
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532009000900019
Tags:	Add Tag No Tags, Be the first to tag this record!