title: Studies on the extraction of sulfonamides from agricultural soils.
abstract: The extraction of six sulfonamides (sulfadiazine, sulfadimidine, sulfathiazole, sulfachloropiridazine, sulfadimethoxine, and sulfaquinoxaline) from soils with different physicochemical characteristics and at several aging times was investigated. Conventional mechanical shaking, microwave-assisted extraction, ultrasound probe-assisted extraction and pressurized liquid extraction techniques were evaluated. The four techniques provided similar results when applied to freshly contaminated soils. However, microwave-assisted extraction was the most suitable to extract sulfonamide aged residues from soils. Microwave-assisted extraction was applied to eight soils aged for 3 months, using acetonitrile:buffer pH 9 (20:80) as the extraction solvent, and recoveries ranged from 15-25% for STZ to 42-64% for SDM.
authors.affiliation: Departament de Química Analítica, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Raich-Montiu
authors.forename: J L
authors.initials: JL
authors.lastname: Beltrán
authors.forename: M D
authors.initials: MD
authors.lastname: Prat
authors.forename: M
authors.initials: M
authors.lastname: Granados
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D002845:Chromatography / Q000379:methods; D008872:Microwaves; D012987:Soil / Q000032:analysis*; D013449:Sulfonamides / Q000302:isolation & purification*; D014465:Ultrasonics
chemical_list: D012987:Soil; D013449:Sulfonamides