Electrochemical behavior of parent and photodegradation products of some selected pesticides

Química Nova

Carlos M. P. Vaz¹  Paulo R. V. Silva Jr.¹  Isis Prado¹  Giuliane M. Castanho²  Fabio R. Simões²  Sérgio A. S. Machado² 

[1] ,Embrapa Instrumentação AgropecuáriaSão Carlos SP ,Brasil

关键词: pesticides;    differential pulse voltammetry;    photodegradation;   

DOI  :  10.1590/S0100-40422008000600007

来源: SciELO

【 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】

CC BY-NC   
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