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- Janák, K, et al.
(författare)
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Enantiomer-specific accumulation of hexabromocyclododecanes in eggs of predatory birds
- 2008
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Ingår i: Chemosphere. - : Elsevier BV. - 0045-6535. ; 73:1, Supplement 1
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Tidskriftsartikel (refereegranskat)abstract
- The diastereomeric composition of hexabromocyclododecane (HBCD) in eggs of peregrine falcon (Falco peregrinus), white-tailed sea eagle (Haliaeetus albicilla), guillemot (Uria aalge) and common tern (Sterna hirundo) as well as the guillemots’ main prey, herring (Clupea harengus) was determined by reversed-phase chromatography with triple-stage quadrupole mass spectrometric detection (LC–MS–MS). α-HBCD was the predominant diastereomer in all bird species, while in herring, γ-HBCD made a substantial contribution. Two, as yet unidentified diastereomers, were detected in common tern egg. The α-, β- and γ-HBCD (+) and (−) enantiomers were separated using a chiral stationary phase. The enantiomer fractions for α-HBCD differed substantially between different bird species as well as between guillemot and its prey, herring. Total HBCD levels determined by LC–MS–MS were comparable to those previously obtained by GC–MS.
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3. |
- Björklund, Justina Awasum, et al.
(författare)
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Perfluoroalkyl compounds (PFCs) in indoor dust : concentrations, human exposure estimates, and sources
- 2009
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Ingår i: Environmental Science and Technology. - : American Chemical Society (ACS). - 0013-936X .- 1520-5851. ; 43:7, s. 2276-2281
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Tidskriftsartikel (refereegranskat)abstract
- Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) are globally distributed, persistent, toxic, and are found in human blood and serum. Exposure pathways are not well characterized. To better understand indoor dust ingestion as a potential pathway for human exposure, we determined the concentrations of these compounds in dust collected from 10 houses, 38 apartments, 10 day care centers, 10 offices, and 5 cars. Samples were prepared using a rapid extraction and cleanup method and analyzed using LC-MS/MS. PFOS and PFOA were found in dust samples from all microenvironments and their concentrations were significantly positively correlated to each other. Highest median concentrations were seen in offices (PFOS: 110 ng/g dry weight) and apartments (PFOA: 93 ng/g dw). Adult and toddler dust ingestion exposures were estimated and compared to dietary exposure data from Canada and Spain. Results show that diet is the most important exposure route, but in a worst case scenario, dust ingestion may also be significant.
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4. |
- Björklund, Justina Awasum, et al.
(författare)
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PFOS and PFOA in dust from Stockholm microenvironments.
- 2008
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Ingår i: The 28th International Symposium on Halogenated Persistent Organic Pollutants (Dioxin 2008), Birmingham, UK, 18-22 August 2008..
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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9. |
- de Wit, Cynthia A.
(författare)
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Nanoteknik – tänk efter före.
- 2008
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Ingår i: MISTRA Nyhetsbrev. ; :5, s. 2-
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Tidskriftsartikel (populärvet., debatt m.m.)
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