title: Natural sunlight and sun simulator photolysis studies of tetra- to hexa-brominated diphenyl ethers in water using solid-phase microextraction.
abstract: Photo-solid-phase microextraction (photo-SPME) is combined for the first time with natural and simulated sunlight to study the photochemical behaviour of environmental concerning tetra- to hexa-brominated diphenyl ethers. The sunlight photodegradation kinetics of five brominated diphenyl ethers (BDE 47, BDE 100, BDE 99, BDE 154 and BDE 153) has been studied. These BDEs are the most abundant congeners in penta-BDE commercial formulations used as flame-retardants and are considered among the most toxic ones. The five studied BDEs were photolytically labile. The detected photodegradation products include more stable lower brominated diphenyl ethers and polybrominated dibenzofurans (PBDFs). The photoformation and decay kinetics of these photoproducts were also monitorized by photo-SPME. Aqueous photodegradation studies have also been carried out. In this case, SPME is only used as the extraction technique. Obtained results in the aqueous photodegradation experiments were compared with those obtained in photo-SPME experiments.
authors.affiliation: Departamento de Química Analítica, Nutrición y Bromatología, Facultad de Química, Instituto de Investigación y Análisis Alimentario, Universidad de Santiago de Compostela, Avda. das Ciencias s/n, 15782 Santiago de Compostela, Spain.
authors.forename: Lucía
authors.initials: L
authors.lastname: Sánchez-Prado
authors.forename: Marta
authors.initials: M
authors.lastname: Lores
authors.forename: Maria
authors.initials: M
authors.lastname: Llompart
authors.forename: Carmen
authors.initials: C
authors.lastname: García-Jares
authors.forename: Josep M
authors.initials: JM
authors.lastname: Bayona
authors.forename: Rafael
authors.initials: R
authors.lastname: Cela
mesh_terms: D004987:Ethers; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D007700:Kinetics; D010782:Photolysis; D011075:Polybrominated Biphenyls / Q000737:chemistry*; D013472:Sunlight; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D004987:Ethers; D011075:Polybrominated Biphenyls; D014874:Water Pollutants, Chemical