Estudo de recuperação de glifosato e AMPA derivados em solo utilizando-se resinas nacionais

• Autor(a) principal: Souza, Tomaz Alves de
• Data de Publicação: 2006
• Outros Autores: Matta, Marcia Helena de Rizzo da, Montagner, Émerson, Abreu, Adley Bergson Gonçalves de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFMS
• Texto Completo: https://repositorio.ufms.br/handle/123456789/163
• topic: Herbicidas; Praguicidas; Herbicides; Pesticides

In the present paper we studied the recoveries of glyphosate, N-(phosphonomethyl)glycine (GLY) and its major metabolite, (aminomethyl)phosphonic acid (AMPA) in soil using national (Brazilian) ion-exchange resins, derivatization by a mixture of trifluoroacetic anhydride and trifluoroethanol and analyses by GC-MS. The quantification limits were 12 ng.g-1 for both compounds and the methodology showed a range of recuperation from 85 to 94% with coefficients of variation (CV) ranging from 4.07 to 6.91% for GLY. For AMPA, the mean recoveries ranged from 87 to 102% with CVs ranging from 5.81 to 6.99%. Additional studies showed that, due to the instability of the derivatized compounds, they must be analysed keeping constant time between derivatization and analysis, preferably less than 24 h.