Determinação espectrofotométrica por injeção em fluxo de glifosato em formulações comerciais de herbicidas
Carregando...
Data
2012-01-01
Autores
Silva, Aline Santana da [UNESP]
Pezza, Leonardo [UNESP]
Pezza, Helena Redigolo [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
A flow injection spectrophotometric procedure for the determination of glyphosate in commercial formulations of herbicides is proposed. The determination is based on the reaction of glyphosate and p-dimethylaminocinnamaldehyde, in acid medium, yielding a colored compound (l máx = 495 nm). Under optimal conditions, Beer's law is obeyed in a concentration range 40-640 mg mL-1 with a correlation coefficient of 0.9996. The detection limit was 8.60 mg mL-1 for glyphosate. The method was successfully applied for the determination of glyphosate in commercial formulations of herbicides. Recovery of glyphosate from various commercial samples of herbicides range from 91.0 to 110%.
Descrição
Palavras-chave
glyphosate, herbicides, flow injection analysis
Como citar
Química Nova. Sociedade Brasileira de Química, v. 35, n. 1, p. 114-118, 2012.