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Environ Sci Pollut Res Int ; 22(5): 3457-66, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25242590

RESUMO

A method has been optimized and validated for the determination of fomesafen in soils using solid-liquid extraction with low-temperature partitioning (SLE/LTP) and analysis by liquid chromatography with a high-efficiency diode array detector (HPLC/DAD). The method was used to evaluate the persistence and mobility of this herbicide in different soils cultivated with bean plants. Recovery values were ≥98.9 %, with variations in the repeatability coefficients of ≤15 %, and a detection limit of 7.3 µg kg(-1). Half-life values of fomesafen were between 60 and 71 days in soil cultivated using a no-till system and 99 and 114 days in soil cultivated using a conventional tillage system. The mobility of fomesafen was moderate and mainly influenced by the organic matter content, pH, and soil type. In Red-Yellow Argisol, which has a higher content of organic matter, the leaching of fomesafen was less pronounced. In Red-Yellow Latosol, which has smaller amounts of organic matter and high pH, the leaching of fomesafen was more pronounced.


Assuntos
Benzamidas/análise , Fabaceae/crescimento & desenvolvimento , Herbicidas/análise , Resíduos de Praguicidas/análise , Poluentes do Solo/análise , Solo/química , Brasil , Cromatografia Líquida de Alta Pressão/métodos , Monitoramento Ambiental , Meia-Vida , Solo/normas , Extração em Fase Sólida
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