title: Development of an analytical procedure to study linear alkylbenzenesulphonate (LAS) degradation in sewage sludge-amended soils.
abstract: A procedure for determining linear alkylbenzenesulphonates (LASs) in sewage sludge and amended soils has been developed. Extraction by sample treatment with 0.5 M potassium hydroxide in methanol and reflux was compared with a previously described extraction procedure in Soxhlet with methanol and solid sodium hydroxide in the sample. Repeatability results were similar with savings in extraction time, solvents and evaporation time. A clean-up method involving a C18 cartridge has been developed. Analytes were quantified by a reversed-phase HPLC method with UV and fluorescence detectors. Recoveries obtained were higher than 84%. The standing procedure was applied to high doses of sewage sludge-amended soils (15%) with increasing quantities of added LASs. Degradation data for a 116-day period are presented.
authors.affiliation: Secció de Cromatografia, C.E.T.S. Institut Químic de Sarrià (Universitat Ramon Llull), Barcelona, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Comellas
authors.forename: J L
authors.initials: JL
authors.lastname: Portillo
authors.forename: M T
authors.initials: MT
authors.lastname: Vaquero
mesh_terms: D001557:Benzenesulfonates / Q000032:analysis*; D001673:Biodegradation, Environmental; D002851:Chromatography, High Pressure Liquid; D006207:Half-Life; D007202:Indicators and Reagents; D012722:Sewage / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001557:Benzenesulfonates; D007202:Indicators and Reagents; D012722:Sewage; D012987:Soil