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Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2018 Sep;35(9):1767-1775. doi: 10.1080/19440049.2018.1469051. Epub 2018 Aug 2.

Occurrence of glyphosate in beer from the Latvian market.

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a University of Latvia , Faculty of Chemistry , Riga , Latvia.
b Institute of Food Safety , Animal Health and Environment 'BIOR' , Riga , Latvia.


A sensitive LC-MS/MS method for the determination of glyphosate in beer has been developed, validated, and applied to analyse 100 beer samples from 24 different producers and distributors in Latvia. The selected samples represented most beer brands and varieties sold in local supermarkets. Different procedures for sample preparation and chromatographic separation were compared. The final version of the method consisted of solid phase extraction, chromatographic separation on aminopropyl stationary phase, and detection using tandem mass spectrometry. The concentration of glyphosate in beer varied from below the LOD of 0.2 μg kg-1 up to 150 μg kg-1, higher than previously reported. Significantly higher (p < 0.01) content of glyphosate was observed in beers that did not have the country of production disclosed on the label and were sold in local supermarkets by distributors from Latvia (1.8 μg kg-1 median concentration in locally produced beer, 6.7 μg kg-1 in beer of undisclosed origin).


Glyphosate; LC-MS/MS; beer; occurrence

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