Flow-injection spectrophotometric determination of glyphosate in commercial formulations of herbicides

Química Nova

Pezza, Leonardo¹  Silva, Aline Santana da¹  Universidade Estadual Paulista, Araraquara, Brasil¹  Pezza, Helena Redigolo¹ 

关键词: glyphosate;    herbicides;    flow injection analysis.;   

DOI  :  10.1590/S0100-40422012000100021

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

A flow injection spectrophotometric procedure for the determination of glyphosate in commercial formulations of herbicides is proposed. The determination is based on the reaction of glyphosate and p-dimethylaminocinnamaldehyde, in acid medium, yielding a colored compound (λmáx = 495 nm). Under optimal conditions, Beer's law is obeyed in a concentration range 40-640 mg mL-1 with a correlation coefficient of 0.9996. The detection limit was 8.60 mg mL-1 for glyphosate. The method was successfully applied for the determination of glyphosate in commercial formulations of herbicides. Recovery of glyphosate from various commercial samples of herbicides range from 91.0 to 110%.

【 授权许可】

Unknown