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Kansas Water Science Center

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earth GRL

Organic Geochemistry Research Laboratory
LCGY: Glyphosate, AMPA, and Glufosinate Method


Glyphosate and glufosinate are herbicides used for weed and vegetation control. AMPA, aminomethylphosphonic acid, is a degradation product of glyphosate. Since the introduction of glyphosate resistant (round-up ready) corn and soybeans glyphosate has become the most widely used herbicide in the world.


  • Sample collection requirements: 2- 125mL 4oz amber glass bottles with Teflon lined caps per sample.
  • Instrumentation: Liquid Chromatography/Tandem Mass Spectrometry
  • Method established in the USGS Laboratory Evaluation Policy(LEP)
  • data results uploaded to QWDX upon request

Compound Name Reporting Limit Parameter Code Method Code USGS Method Report CAS #
Glyphosate 0.02 μg/L 62722 LCM57 O-2141-09 1071-83-6
Aminomethylphosphonic Acid (AMPA) 0.02 μg/L 62649 LCM57 O-2141-09 1066-51-9
Glufosinate 0.02 μg/L 62721 LCM57 O-2141-09 77182-82-2

USGS Method Approved Reports

Meyer, M.T., Loftin, K.A., Lee, E.A., Hinshaw, H.H., Dietze, J.E., Scribner, E.A., 2009, Determination of glyphosate, its degradation product aminomethylphosphonic acid, and glufosinate, in water by isotope dilution and online solid-phase extraction and liquid chromatography/tandem mass spectrometry, Techniques and Methods Book 5 Chapter A10, pp. 32.

Lee, E.A., Strahan, A.P., Thurman, E.M., 2002, Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group-Determination of glyphosate, aminomethylphosphonic acid, and glufosinate in water using online solid-phase extraction and high-performance liquid chromatography/mass spectrometry, U.S. Geological Survey Open-File Report 01-454, pp. 13.


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