Enantiomer-specific accumulation of hexabromocyclododecanes in eggs of predatory birds

• 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.

Ämnesord

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Nyckelord

Birds; Eggs; HBCD; LC–MS–MS; Enantiomer fractions

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)