Electrochemical behavior of parent and photodegradation products of some selected pesticides

Quimica nova

Vaz, Carlos M. P.¹  Prado, Isis¹  Silva Jr., Paulo R. V.¹  Simões, Fabio R.²  Castanho, Giuliane M.³  Machado, Sérgio A. S.⁴ 

[1] Embrapa Instrumentação Agropecuária, São Carlos, Brasil;Universidade Federal de São Carlos, São Carlos, Brasil;Universidade de São Paulo, Piracicaba, Brasil;Universidade de São Paulo, São Carlos, Brasil

关键词: pesticides;    differential pulsevoltammetry;    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 extensivelystudied, but little attention has been given to the study of their degradationproducts (by-products) by electrochemical methods. However, the degradationproducts of pesticides can be even more toxic then the parent products and suchstudies should be encouraged. Therefore, the objective of this work was to evaluatethe electroactivity of by-products of imazaquin, methylparathion, bentazon andatrazine, generated by UV irradiation and measured using cyclic and differentialpulse voltammetry and UV-visible absorption spectrophotometry. Results haveshown that several by-products exhibit electroactivity, allowing, in some cases,the simultaneous determination of both parent and degradation products.

【 授权许可】

CC BY