title: Analysis of Glyphosate and Aminomethylphosphonic Acid in Nutritional Ingredients and Milk by Derivatization with Fluorenylmethyloxycarbonyl Chloride and Liquid Chromatography-Mass Spectrometry.
abstract: A straightforward analytical method based on derivatization with fluorenylmethyloxycarbonyl chloride and liquid chromatography-mass spectrometry has been developed for the analysis of residues of glyphosate and aminomethylphosphonic acid (AMPA) in a suite of nutritional ingredients derived from soybean, corn, and sugar beet and also in cow's milk and human breast milk. Accuracy and intermediate precision were 91-116% and <10% RSD, respectively, in soy protein isolate. Limits of quantitation were 0.05 and 0.005 μg/g in powdered and liquid samples, respectively. Glyphosate and AMPA were quantified at 0.105 and 0.210 μg/g (soy protein isolate) and 0.850 and 2.71 μg/g (soy protein concentrate, both derived from genetically modified soybean), respectively. Residues were not detected in soy milk, soybean oil, corn oil, maltodextrin, sucrose, cow's milk, whole milk powder, or human breast milk. The method is proposed as a convenient tool for the survey of glyphosate and AMPA in the ingredient supply chain.
authors.affiliation: Abbott Laboratories, 3300 Stelzer Road, Columbus, Ohio 43219, United States.
authors.forename: Stefan
authors.initials: S
authors.lastname: Ehling
authors.affiliation: Abbott Laboratories, 3300 Stelzer Road, Columbus, Ohio 43219, United States.
authors.forename: Todime M
authors.initials: TM
authors.lastname: Reddy
mesh_terms: D000818:Animals; D002417:Cattle; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005449:Fluorenes / Q000737:chemistry; D005506:Food Contamination / Q000032:analysis; D005998:Glycine / Q000031:analogs & derivatives* / Q000032:analysis; D006540:Herbicides / Q000032:analysis*; D007555:Isoxazoles; D008892:Milk / Q000737:chemistry*; D063065:Organophosphonates / Q000032:analysis*; D053719:Tandem Mass Spectrometry / Q000379:methods*; D013777:Tetrazoles; D000097797:Glyphosate
chemical_list: D005449:Fluorenes; D005998:Glycine; D006540:Herbicides; D007555:Isoxazoles; D063065:Organophosphonates; D013777:Tetrazoles; D000097797:Glyphosate; C418233:2-amino-3-(3-hydrox-5(2-methyl-2H-tetrazol-5-yl)isoxazol-4-yl)propionic acid
keywords: aminomethylphosphonic acid; fluorenylmethyloxycarbonyl chloride; glyphosate; liquid chromatography−mass spectrometry; milk; soy protein