Electrochemical behavior of parent and photodegradation products of some selected pesticides

Química Nova

Machado, Sérgio A. S.¹  Universidade de São Paulo, São Carlos, Brasil¹  Castanho, Giuliane M.¹  Vaz, Carlos M. P.¹  Universidade Federal de São Carlos, São Carlos, Brasil¹  Embrapa Instrumentação Agropecuária, São Carlos, Brasil¹  Prado, Isis¹  Universidade de São Paulo, Piracicaba, Brasil¹  Silva Jr., Paulo R. V.¹  Simões, Fabio R.¹ 

关键词: pesticides;    differential pulse voltammetry;    photodegradation.;   

DOI  :  10.1590/S0100-40422008000600007

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown