title: Mobility and persistence of the herbicide fomesafen in soils cultivated with bean plants using SLE/LTP and HPLC/DAD.
abstract: 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.
authors.affiliation: Departamento de Química, Universidade Federal de Viçosa, 36570-900, Viçosa, MG, Brazil.
authors.forename: Anna I G
authors.initials: AI
authors.lastname: Costa
authors.forename: Maria Eliana L R
authors.initials: ME
authors.lastname: Queiroz
authors.forename: Antônio A
authors.initials: AA
authors.lastname: Neves
authors.forename: Roberta C
authors.initials: RC
authors.lastname: de Assis
authors.forename: Carlos E S
authors.initials: CE
authors.lastname: dos Soares
authors.forename: Antônio A
authors.initials: AA
authors.lastname: da Silva
authors.forename: Leonardo
authors.initials: L
authors.lastname: D'Antonino
authors.forename: André F
authors.initials: AF
authors.lastname: de Oliveira
authors.forename: Carlos R
authors.initials: CR
authors.lastname: Bellato
mesh_terms: D001549:Benzamides / Q000032:analysis*; D001938:Brazil; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004784:Environmental Monitoring; D007887:Fabaceae / Q000254:growth & development*; D006207:Half-Life; D006540:Herbicides / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012987:Soil / Q000737:chemistry* / Q000592:standards; D012989:Soil Pollutants / Q000032:analysis*; D052616:Solid Phase Extraction
chemical_list: D001549:Benzamides; D006540:Herbicides; D010573:Pesticide Residues; D012987:Soil; D012989:Soil Pollutants; C088563:fomesafen