Residues of glyphosate and aminomethylphosphonic acid (AMPA) in genetically modified glyphosate tolerant soybean, corn and cotton crops

ABSTRACT: Glyphosate is a broad-spectrum herbicide capable of controlling a wide range of weed. It uses could cause the occurrence of residues in conventional or genetically modified crops. For this purpose, grains (soybean and corn) and cotton seeds were sampled from commercial areas in 2012/2013 to 2017/2018 seasons in different Brazilian agricultural regions to monitor glyphosate residues levels and its metabolite (aminomethylphosphonic acid - AMPA) after different managements. The glyphosate residues levels in genetically modified corn (GM) ranged from no detected (ND) to 0.15 mg kg-1, in GM soybean values ranged from ND to 2.81 mg kg-1 and in GM cotton ranged from ND to 1.78 mg kg-1. AMPA residues levels indicated a correlation with the glyphosate residues. Glyphosate residues levels in soybean and corn grains and cotton seeds were within the Maximum Residue Limits (MRLs) established by ANVISA and Codex Alimentarius.

摘要：草甘膦（Glyphosate）是一种广谱除草剂，可有效防控多种杂草。其施用可能导致常规作物或转基因作物中产生残留。为监测相关残留情况，研究团队于2012/2013至2017/2018种植季，从巴西不同农业产区的商业种植区域采集了谷物（大豆与玉米）及棉籽样本，以评估不同管理措施下草甘膦及其代谢物氨甲基膦酸（AMPA）的残留水平。转基因玉米中的草甘膦残留量区间为未检出（ND）至0.15 mg·kg⁻¹，转基因大豆的残留量区间为未检出（ND）至2.81 mg·kg⁻¹，转基因棉籽的残留量区间为未检出（ND）至1.78 mg·kg⁻¹。AMPA残留水平与草甘膦残留量呈相关性。本次检测中大豆、玉米谷物及棉籽的草甘膦残留量均符合巴西国家卫生监督局（ANVISA）与食品法典委员会（Codex Alimentarius）制定的最大残留限量（MRLs）标准。