Rapid and direct determination of glyphosate and aminomethylphosphonic acid in water using anion-exchange chromatography with coulometric detection.
A simple, rapid, and low-cost coulometric method for direct detection of glyphosate and aminomethylphosphonic acid (AMPA) in water samples using anion-exchange chromatography and coulometric detection with copper electrode is presented. Under optimized conditions, the limits of detection (LODs) (S/N=3) were 0.038microgml(-1) for glyphosate and 0.24microgml(-1) for AMPA, without any preconcentration method. The calibration curves were linear and presented an excellent correlation coefficient. The method was successfully applied to the determination of glyphosate and AMPA in water samples without any kind of extraction, clean-up, or preconcentration step. No interferent was found in the water, like this, the recovery was, practically, 100%.
Coutinho
Cláudia F B
CF
Universidade de São Paulo, Instituto de Química de São Carlos, Av. Trabalhador São-carlense 400, Caixa Postal 780, CEP 13566-590 São Carlos, SP, Brazil.
Coutinho
Lincoln F M
LF
Mazo
Luiz H
LH
Nixdorf
Suzana L
SL
Camara
Carlos A P
CA
D002852:Chromatography, Ion Exchange / Q000379:methods*; D005998:Glycine / Q000031:analogs & derivatives* / Q000032:analysis; D007555:Isoxazoles; D063065:Organophosphonates / Q000032:analysis*; D013777:Tetrazoles; D014867:Water / Q000737:chemistry*; D000097797:Glyphosate
D005998:Glycine; D007555:Isoxazoles; D063065:Organophosphonates; D013777:Tetrazoles; D014867:Water; D000097797:Glyphosate; C418233:2-amino-3-(3-hydrox-5(2-methyl-2H-tetrazol-5-yl)isoxazol-4-yl)propionic acid