title: Enormous PCBs increase in oysters from the coast of Guangdong, China.
abstract: PCBs equivalent to Aroclor 1242 and 1254 in soft tissues of oysters Crassostrea rivularis from the Guangdong coast, China, were measured using a GC-ECD. PCB concentrations (ng g(-1)d.w.) ranged from 30 to 2040 with an average of 315 in 2003-2007, and 0.35-1.43 with an average of 0.56 in 1989-1991. Annual averages were 0.61, 0.65, 313, 290 and 342ng g(-1), respectively in 1989, 1991, 2003, 2006 and 2007. In east Guangdong, the Pearl River Estuary, and west Guangdong, regional means were 444, 273, 194ng g(-1), respectively in 2003-2007, and 0.43, 0.78, 0.38ng g(-1), respectively in 1989-1991, indicating PCB levels in oysters have risen greatly by ratios of 350-1032 compared with earlier data. PCB sources may derive from older transformers, printing materials and pressworks. Fortunately, current residual PCBs in the oysters were 0.004-0.253mg kg(-1) (w.w.), still below hygienic criteria of China and developed countries.
authors.affiliation: South China Sea Fisheries Research Institute, Chinese Academy of Fishery Science, No. 231 Xin Gang Xi Road, Guangzhou, Guangdong 510300, China. ganjuli@163.com
authors.forename: Ju-Li
authors.initials: JL
authors.lastname: Gan
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Jia
authors.forename: Ting
authors.initials: T
authors.lastname: Jia
authors.forename: Qin
authors.initials: Q
authors.lastname: Lin
authors.forename: Wen-Gui
authors.initials: WG
authors.lastname: Cai
mesh_terms: D000818:Animals; D001140:Aroclors / Q000378:metabolism; D002681:China; D020111:Chlorodiphenyl (54% Chlorine) / Q000378:metabolism; D049896:Crassostrea / Q000378:metabolism*; D004781:Environmental Exposure / Q000706:statistics & numerical data*; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D014877:Water Pollution, Chemical / Q000706:statistics & numerical data*
chemical_list: D001140:Aroclors; D014874:Water Pollutants, Chemical; D020111:Chlorodiphenyl (54% Chlorine); C027423:aroclor 1242; D011078:Polychlorinated Biphenyls