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Fast analysis of glufosinate, glyphosate and its main metabolite, aminomethylphosphonic acid, in edible oils, by liquid chromatographycoupled with electrospray tandem mass spectrometry.

Fast analysis of glufosinate, glyphosate and its main metabolite, aminomethylphosphonic acid, in edible oils, by liquid chromatographycoupled with electrospray tandem mass spectrometry.

Authors :
Chiarello M
Jiménez-Medina ML
Marín Saéz J
Moura S
Garrido Frenich A
Romero-González R
Source :
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment [Food Addit Contam Part A Chem Anal Control Expo Risk Assess] 2019 Sep; Vol. 36 (9), pp. 1376-1384. Date of Electronic Publication: 2019 Jul 09.
Publication Year :
2019

Abstract

A method has been developed for the rapid, specific, accurate, precise and sensitive determination of glufosinate, glyphosate and its major metabolite, aminomethylphosphonic acid, in edible oils, by liquid chromatography coupled to tandem mass spectrometry. Oils were extracted with acidified water (1% formic acid), and the extracts were directly injected into an LC using a Hypercarb column as the stationary phase. The analytes were eluted by a mobile phase of methanol and water containing 1% acetic acid, and they were ionised by electrospray ionisation in negative ion mode. The method was validated and limits of quantification ranged from 5 μg kg <superscript>-1</superscript> (aminomethylphosphonic acid) to 10 μg kg <superscript>-1</superscript> (glyphosate and glufosinate). Three concentrations (10, 50 and 100 μg kg <superscript>-1</superscript> ) were selected to perform recovery studies. Mean recoveries ranged from 81.4% to 119.4%. Intra and inter-day precision were lower than 19%. Different edible oils were analysed, and no residues of the studied herbicides were detected above limits of quantification.

Details

Language :
English
ISSN :
1944-0057
Volume :
36
Issue :
9
Database :
MEDLINE
Journal :
Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment
Publication Type :
Academic Journal
Accession number :
31287383
Full Text :
https://doi.org/10.1080/19440049.2019.1631493