Development and validation of a method of analysis of glyphosate in soy grains

Quimica nova

Abreu, Adley Bergson Gonçalves de¹ 

[1] Universidade Federal de Mato Grosso, Cuiabá, Brasil

关键词: glyphosate;    glyphosate-resistantsoybean;    pesticide.;   

DOI  :  10.1590/S0100-40422008000100002

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The main objective of this work is to developan efficient procedure to determine glyphosate in soybean grains. The cleanupof the aqueous extracts was done in two steps, beginning with liquid-liquidpartitioning and then solid-phase extraction with anion exchange resin. Afterderivatization with a mixture of trifluoroacetic anhydride (TFAA) and trifluoroethanol(TFE), quantification was done by gas chromatography coupled to mass spectrometry.The mean recovery and RSD of the spiked samples were, respectively, 80.5% and3.1% at level 0.200 mg kg-1, 93.3% and 18.7% at level 0.500 mg kg-1and 92% and 3.5% at level 1.000 mg kg-1. The method was linearin the working range (correlation coefficient = 0.9965).

【 授权许可】

CC BY