Autoria: FERRACINI, V. L.; QUEIROZ, S. C. do N. de; GOMES, M. A. F.; SANTOS, G. L. dos

Resumo: This work presents an alternative method for determination of the herbicides tebuthiuron and hexazinone in ground water. The extraction was made with dichloromethane and the analyses by high performance liquid chromatography (HPLC), using reversed-phase column, C-18, mobile phase methanol/water 50:50, v/v, detection and quantification at 247 nm. The following validation parameters were obtained: limit of detection of method 0.02 and 0.03 ug L-1, limit of quantification of method 0.07 and 0.09 ?g L-1; linear range limit of quantification of instrument - 300 ug L-1 (r2 ? 0.998); recoveries from 90.3 to 108.2% and 90.3 to 101.6%; intermediary precision (%RSD) < 8 and < 6%, for hexazinone and tebuthiuron, respectively. The method showed to be efficient and reliable for determination of the herbicides in ground water.

Ano de publicação: 2005

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Meio Ambiente

Palavras-chave: Agrotóxico, Análise química, Aqüífero Guarani, Cana de açúcar, Efeito Residual, Lixiviação, Metodologia, Monitoramento, Monocultura, Método, Poluição da água, Qualidade da água, Resíduo, Validação