Rapid and direct determination of glyphosate and aminomethylphosphonic acid in water using anion-exchange chromatography with coulometric detection

Autor(es)

Coutinho, Claudia F. B. ^[1] ; Coutinho, Lincoln F. M. ^[1] ; Mazo, Luiz H. ^[1] ; Nixdorf, Suzana L. ^[2] ; Camara, Carlos A. P. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Estadual Londrina, Dept Quim, BR-86051990 Londrina, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Chromatography A; v. 1208, n. 1-2, p. 246-249, OCT 24 2008.
• Citações Web of Science: 34

Resumo

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 0.038 mu g ml(-1) for glyphosate and 0.24 mu g ml(-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%. (c) 2008 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 04/09384-7 - Desenvolvimento de instrumentação dedicada à cromatografia líquida de alta eficiência miniaturizada (micro/CLC)
• Beneficiário: Lincoln Figueira Marins Coutinho
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto