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Master's Dissertation
DOI
https://doi.org/10.11606/D.75.2009.tde-25082009-172803
Document
Author
Full name
Bruno Molero da Silva
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2009
Supervisor
Committee
Rezende, Maria Olimpia de Oliveira (President)
Olivares, Igor Renato Bertoni
Zuin, Vânia Gomes
Title in Portuguese
Desenvolvimento de metodologia simples, rápida e sem etapa de clean-up para determinação de glifosfato em amostras ambientais de água e solo por HPLC/UV-VIS
Keywords in Portuguese
água
determinação direta de glifosfato
HPLC
solo
Abstract in Portuguese
O glifosato, N- Fosfonometil- glicina, é um herbicida sistêmico e pós-emergente com grande eficiência na remoção de ervas daninhas, apresentando baixo custo, que é refletido na sua vasta aplicação. Assim, os cuidados relacionados com a possibilidade de contaminação ambiental com esta molécula devem ser estudados cautelosamente, já que há evidências de efeitos deletérios no ambiente após a sua utilização prolongada que podem causar riscos à saúde humana. Portanto, o presente trabalho teve como objetivo desenvolver uma metodologia adequada para a determinação de glifosato em amostras de água e solo utilizando a técnica de cromatografia Líquida de Alta Eficiência (HPLC). O método proposto descreve uma alternativa eficaz para a determinação de glifosato em amostras de água eliminando as etapas de extração e clean-up. Os limites de detecção e quantificação relacionados ao método foram 9,93 e 30,1 µg L-1. Nas amostras de solo os resultados de recuperação do glifosato variaram de 78,1 a 113,2 % conforme a porcentagem da fração orgânica, inorgânica, entre outros fatores. Além disso, o método proposto demonstrou ser seletivo, com boa linearidade, precisão, repetibilidade e robustez.
Title in English
Development of methodology simple, fast and without the clean-up step for determination of glyphosate in environmental samples of water and soil by HPLC / UV-VIS
Keywords in English
direct determination of glyphosate
HPLC
soil
water
Abstract in English
Glyphosate, N-(phosphonometil)glycine, is a systemic herbicide and post-emergent with great efficiency in the removal of weeds, featuring low cost, which is reflected on its wide application. Due to this fact, special care in order to not contaminate the environment has to be attend, since there is evidence of deleterious effects on the environment after its prolonged use including risks to human health. Therefore, the aim of this study was to develop an adequate methodology for the determination of glyphosate in samples of water and soil using the technique of high performance liquid chromatography (HPLC). The proposed method describes an efficient alternative for the determination of glyphosate in water samples by eliminating the steps of extraction and clean-up. The limits of detection and quantification related to the method were 9.93 and 30.1 µg L-1. Samples of soil results in recovery of glyphosate ranged from 78.1 to 113.2% due to the percentage fraction of organic, inorganic, among other factors. Moreover, the proposed method proved to be selective, with good linearity, accuracy, repeatability and robustness.
 
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BrunoMoleroR.pdf (1.71 Mbytes)
Publishing Date
2009-08-27
 
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