Development and inter-laboratory validation of analytical methods for glufosinate and its two metabolites in foods of plant origin

文献类型： 外文期刊

第一作者： Wu, Yangliu

作者： Wu, Yangliu;Zhou, Yilu;Zeng, Wenbo;Pan, Canping;Jiao, Xun;She, Yongxin;Cui, Hailan

作者机构：

关键词： Glufosinate; Metabolites; Plant origin foods; Uncertainty

期刊名称：ANALYTICAL AND BIOANALYTICAL CHEMISTRY （ 影响因子：4.3； 五年影响因子：4.0 ）

ISSN： 1618-2642

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Glufosinate is widely used to control various weeds. Glufosinate and its main metabolites have become the focus of attention because of their high water solubility and persistence in aquatic systems. Quantification of the agrochemical product and its metabolite residues is essential for the safety of agricultural products. In this study, a highly specific, simple method was developed to directly determine glufosinate and its metabolite residues in 21 plant origin foods by liquid chromatography with tandem mass spectrometry (LC-MS/MS), and it was validated on 11 foods in five laboratories. Finally, the repeatability limit, reproducibility limit, and uncertainty of the method were calculated based on these validated data and used to support the more accurate detection results. Four different chromatographic columns were used to analyze three target compounds, and the anionic polar pesticide column showed the optimum separation and peak shape. Composition of the mobile phase, extraction solvent, and the clean-up procedure were optimized. The developed method was validated on 21 plant origin foods. The average recoveries were 74-115% for all matrices. The validation results of five laboratories showed this method had a good repeatability (RSDr < 9.5%) and reproducibility (RSDR < 18.9%). The method validation parameters met the requirements of guidance established by the European Union (EU) and China for pesticide residue analysis. This methodology can be used for a routine monitoring that performs well for glufosinate and its metabolite residues.

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