title: Temporal trend studies on tetra- and pentabrominated diphenyl ethers and hexabromocyclododecane in guillemot egg from the Baltic Sea.
abstract: Guillemot eggs from the Baltic Sea, sampled between 1969 and 2001, were analyzed for tetra- and pentabromodiphenyl ethers (2,2',4,4'-tetraBDE (BDE-47), 2,2',4,4',5-pentaBDE (BDE-99), and 2,2',4,4',6-pentaBDE (BDE-100)), and hexabromocyclododecane (HBCD). This temporal trend study indicates that the concentrations of the polybrominated diphenyl ether compounds increased from the 1970s to the 1980s, peaking around the mid- to the late-1980s. These peaks are then followed by a rapid decrease in concentrations during the rest of the study period, with the concentrations of the major BDE congener below 100 ng/g lipid weight at the end of the period. This corresponds to less than 10% of its peak values. The concentrations of HBCD show a different pattern over time. After a peak in the middle of the 1970s followed by a decrease, the concentrations increased during the latter part of the 1980s. During the recent 10-yr period no significant change has occurred, and the annual mean concentrations are more or less stable at a higher level as compared to the beginning of the study period.
authors.affiliation: Laboratory for Analytical Environmental Chemistry, Institute of Applied Environmental Research, Stockholm University, SE-106 91 Stockholm, Sweden. ulla.sellstrom@itm.su.se
authors.forename: Ulla
authors.initials: U
authors.lastname: Sellström
authors.forename: Anders
authors.initials: A
authors.lastname: Bignert
authors.forename: Amelie
authors.initials: A
authors.lastname: Kierkegaard
authors.forename: Lisbeth
authors.initials: L
authors.lastname: Häggberg
authors.forename: Cynthia A
authors.initials: CA
authors.lastname: de Wit
authors.forename: Mats
authors.initials: M
authors.lastname: Olsson
authors.forename: Bo
authors.initials: B
authors.lastname: Jansson
mesh_terms: D000818:Animals; D001454:Baltic States; D001717:Birds; D004784:Environmental Monitoring; D004987:Ethers / Q000032:analysis; D005260:Female; D006842:Hydrocarbons, Brominated / Q000032:analysis*; D010063:Ovum / Q000737:chemistry; D011075:Polybrominated Biphenyls / Q000032:analysis*; D013997:Time Factors; D014018:Tissue Distribution
chemical_list: D004987:Ethers; D006842:Hydrocarbons, Brominated; D011075:Polybrominated Biphenyls; C089796:hexabromocyclododecane