title: New sample treatment for the determination of alkylphenols and alkylphenol ethoxylates in agricultural soils.
abstract: A new sample treatment for alkylphenols (AP) and alkylphenol ethoxylates (APEO) determination in agricultural soil samples has been developed. In a first stage these compounds were isolated from soil by pressurized liquid extraction (PLE) using methanol. In a second stage the extracts were cleaned up and pre-concentrated by solid-phase extraction (SPE) using ENV+cartridges. The effect of different variables on PLE and SPE was also studied. In the last place, separation and quantification of analytes were performed by liquid chromatography with fluorescence detection (LC-FD) and gas chromatography coupled to mass spectrometry (GC-MS). Quantification limits (QL) ranged from 20 to 200 ng g(-1) for LC-FD and from 3 to 126 ng g(-1) for GC-MS. This method was satisfactorily applied in a study field designed to evaluate the environmental behaviour of APEOs in agricultural soils.
authors.affiliation: Research Group of Analytical Chemistry and Life Sciences, Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Jiménez-Díaz
authors.forename: O
authors.initials: O
authors.lastname: Ballesteros
authors.forename: A
authors.initials: A
authors.lastname: Zafra-Gómez
authors.forename: G
authors.initials: G
authors.lastname: Crovetto
authors.forename: J L
authors.initials: JL
authors.lastname: Vílchez
authors.forename: A
authors.initials: A
authors.lastname: Navalón
authors.forename: C
authors.initials: C
authors.lastname: Verge
authors.forename: J A
authors.initials: JA
authors.lastname: de Ferrer
mesh_terms: D000383:Agriculture; D004784:Environmental Monitoring / Q000379:methods; D005026:Ethylene Glycols / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D010636:Phenols / Q000032:analysis*; D012987:Soil / Q000032:analysis* / Q000592:standards; D012989:Soil Pollutants / Q000032:analysis*; D013030:Spain
chemical_list: C524470:4-t-octylphenolmonoethoxylate; D005026:Ethylene Glycols; D010636:Phenols; D012987:Soil; D012989:Soil Pollutants; C474055:octylphenol; C025256:nonylphenol