Simultaneous esterification and acylation of pesticides for analysis by gas chromatography. 1. Derivatization of glyphosate and (aminomethyl)phosphonic acid with fluorinated alcohols-perfluorinated anhydrides

1985 ◽  
Vol 33 (5) ◽  
pp. 944-947 ◽  
Author(s):  
Cynthia L. Deyrup ◽  
Shou Mei Chang ◽  
Randy A. Weintraub ◽  
H. Anson Moye
Keyword(s):  
Gas Chromatography ◽  
Phosphonic Acid ◽  
Fluorinated Alcohols ◽  
Aminomethyl Phosphonic Acid

scholarly journals Determination of Glyphosate and Its Metabolite, (Aminomethyl)phosphonic Acid, in River Water

1996 ◽  
Vol 79 (1) ◽  
pp. 157-162 ◽  
Author(s):  
Paul S Mogadati ◽  
Judith B Louis ◽  
Joseph D Rosen
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
River Water ◽  
Phosphonic Acid ◽  
Exchange Resin ◽  
Ion Trap ◽  
Anion Exchange Resin ◽  
Ion Trap Mass Spectrometry ◽  
Aminomethyl Phosphonic Acid

Abstract A procedure for extracting glyphosate and its meta bolite, (aminomethyl)phosphonic acid, from river water and for determining these 2 compounds by gas chromatography/ion trap mass spectrometry is described. Both compounds were extracted with Bio-Rad AG 1-X8 anion-exchange resin (formate form) prior to derivatization with a mixture of trifluoroacetic anhydride and trifluoroethanol. Limits of detection for glyphosate and its metabolite were 1 ppb even when as little as 10 mL water was analyzed. Recoveries of both compounds from river water fortified at 50 ppb were >90%.

Determination of Glyphosate Herbicide and (Aminomethyl)phosphonic Acid in Natural Waters by Liquid Chromatography Using Pre-Column Fluorogenic Labeling with 9-Fluorenylmethyl Chloroformate

1986 ◽  
Vol 69 (3) ◽  
pp. 458-461 ◽  
Author(s):  
Carl J Miles ◽  
Louis R Wallace ◽  
H Anson Moye
Keyword(s):  
Liquid Chromatography ◽  
Phosphonic Acid ◽  
Natural Waters ◽  
Sample Pretreatment ◽  
Fluorescence Detector ◽  
Rotary Evaporation ◽  
Glyphosate Herbicide ◽  
And Storage ◽  
Aminomethyl Phosphonic Acid

Abstract An analytical method has been developed for determination of glyphosate herbicide and its major metabolite, (aminomethyl)phosphonic acid (AMFA), in natural waters. Sample pretreatment consisted of filtration, addition of phosphate buffer, concentration by rotary evaporation, and a final filtration before derivatization with 9-fluorenylmethyl chloroformate. The derivatives were separated by anion exchange liquid chromatography and measured with a fluorescence detector. Standard curves were linear over 3 orders of magnitude and minimal detectable quantities were 10 ng/mL for glyphosate and 5 ng/mL for AMPA. The 20-fold concentration factor realized in sample preparation corresponds to ppb method detection limits for glyphosate and AMPA in natural waters. Recovery and storage studies were performed and are discussed.

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