Determination of Glyphosate in Water Samples by Multi-pumping Flow System Coupled to a Liquid Waveguide Capillary Cell

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Silva, AS (Autor) Outra; Toth, IV (Autor) Outra; Pezza, L (Autor) Outra; Pezza, HR (Autor) Outra; Lima, JLFC (Autor) FFUP

Revista

Título: Analytical Sciences

Vol. 27 Nº 5

Páginas: 1031-1036

ISSN: 0910-6340

Editora: Japan Society for Analytical Chemistry

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-002-KWV

Abstract (EN): A simple screening method was developed for the determination of glyphosate in water samples using a multi-pumping flow system. The proposed method is based on the reaction between glyphosate and p-dimethylaminocinnamaldehyde (p-DAC), in an acid medium where the reaction product can be measured spectrophotometrically at lambda(max) = 495 nm. An experimental design methodology was used to optimize the measurement conditions. The proposed method was applied to the determination of glyphosate in water samples in a concentration range from 0.5 to 10 mu g mL(-1). The limit of detection and quantification were 0.17 and 0.53 mu g mL(-1), respectively. The results obtained (88.5 to 104.5%) in recovery studies for the determination of glyphosate in different water samples indicated good accuracy and no matrix effect for the developed method. Samples were also analyzed by a confirmatory HPLC method, and agreement within the two set of results was found.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6