1986
DOI: 10.1021/jf00072a006
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Validation of an analytical residue method for analysis of glyphosphate and metabolite: an interlaboratory study

Abstract: A new residue method for the analysis of glyphosate and (aminomethyl)phosphonic acid has been validated with an interlaboratory study. Five different analysts from Monsanto Co. and other laboratories participated in testing of five different matrixes: alfalfa forage, cabbage, grapes, soybean grain, environmental water. These were chosen to represent the wide variety of matrixes analyzed for glyphosate-related residues. The cornerstone of the method is concentration and isolation via chelation ion exchange, wit… Show more

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Cited by 78 publications
(26 citation statements)
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“…Sample extracts were analyzed using HPLC with quantitation of residues of glyphosate and AMPA by fluorescence detection following post-column o-phthalaldehyde derivatization. All procedures were similar to those of Cowell et al (1986), except that the hypochlorite concentration in the post-column oxidizing solution was increased by a factor of three and each extract was passed through a second anion exchange resin cleanup column (Cessna and Cain 1992). The HPLC and post-column reaction systems used in the present study have been described in detail previously (Cessna and Cain 1992).…”
Section: Residue Analysismentioning
confidence: 99%
See 1 more Smart Citation
“…Sample extracts were analyzed using HPLC with quantitation of residues of glyphosate and AMPA by fluorescence detection following post-column o-phthalaldehyde derivatization. All procedures were similar to those of Cowell et al (1986), except that the hypochlorite concentration in the post-column oxidizing solution was increased by a factor of three and each extract was passed through a second anion exchange resin cleanup column (Cessna and Cain 1992). The HPLC and post-column reaction systems used in the present study have been described in detail previously (Cessna and Cain 1992).…”
Section: Residue Analysismentioning
confidence: 99%
“…The analytical method of Cowell et al (1986), with modifications described in Cessna and Cain (1992), proved to be suitable for the analysis of both glyphosate and AMPA in canola seed. Recoveries of glyphosate from milled seed tissue fortified at 1.0, 0.2 and 0.1 mg kg -1 were 84 ± 16% (n = For personal use only.…”
Section: Background Interferences/glyphosate and Ampa Recoveriesmentioning
confidence: 99%
“…Cowell e colaboradores 12 utilizaram extração com triclorometano, purificando a fase aquosa em resina, na forma Fe 3+ . A eluição foi feita com HCl 6 mol L -1 , seguida de tratamento com resina de troca aniônica, eluição com HCl, evaporação até secura, retomando em água.…”
Section: Extração Em Amostras De áGuaunclassified
“…Como a molécula do glifosato apresenta elevada polaridade e ausência de cromóforos, a determinação cromatográfica exige etapas preliminares que permitam a detecção/quantificação. Trabalhos recentemente publicados têm utilizado cromatografia líquida de alta eficiência, cromatografia de troca iônica, cromatografia iônica ou cromatografia gasosa; tais procedimentos apresentam boa sensibilidade, mas além de morosos têm custo elevado [12][13][14][15][16][17] . Uma boa revisão dos métodos utilizados para a determinação de glifosato foi apresentada por Amarante Junior et al 11 .…”
Section: Introductionunclassified