Electrochemical behavior of parent and photodegradation products of some selected pesticides

Author(s)

Vaz, Carlos M. P. ^[1] ; Silva, Jr., Paulo R. V. ^[1] ; Prado, Isis ^[1] ; Castanho, Giuliane M. ^[2] ; Simoes, Fabio R. ^[3] ; Machado, Sergio A. S. ^[4]

Affiliation

^[1] Embrapa Instrumentacao Agropecuaria, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13400970 Piracicaba, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Quim, BR-13560970 Sao Carlos, SP - Brazil

^[4] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Química Nova; v. 31, n. 6, p. 1310-1314, 2008.
• Web of Science Citations: 8

Abstract

Electrochemical behavior of pesticides is extensively studied, but little attention has been given to the study of their degradation products (by-products) by electrochemical methods. However, the degradation products of pesticides can be even more toxic then the parent products and such studies should be encouraged. Therefore, the objective of this work was to evaluate the electroactivity of by-products of imazaquin, methylparathion, bentazon and atrazine, generated by UV irradiation and measured using cyclic and differential pulse voltammetry and UV-visible absorption spectrophotometry. Results have shown that several by-products exhibit electroactivity, allowing, in some cases, the simultaneous determination of both parent and degradation products. (AU)

• FAPESP's process: 01/13745-7 - Development of polymeric sensor for applications in agribusiness and environment
• Grantee: Luiz Henrique Capparelli Mattoso
• Support Opportunities: Research Projects - Thematic Grants