Organochlorine contaminants in arctic marine food chains: accumulation of specific polychlorinated biphenyls and chlordane-related compounds.
Organochlorine contaminants in arctic marine food chains: accumulation of specific polychlorinated biphenyls and chlordane-related compounds.
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DOI：
10.1021/es00174a012
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发表时间：
1988-09
影响因子：
11.4
通讯作者：
Derek C. G. Mulr;R. Norstrom;M. Simon
中科院分区：
文献类型：
--
作者：
Derek C. G. Mulr;R. Norstrom;M. Simon
对来自加拿大北极中东部的59头环海豹(Phoca Hispida)的肌肉和北极熊(Ursus Maritimus)脂肪以及脂肪中的多氯联苯(S-多氯联苯)和氯丹相关化合物(S-氯)以及滴滴涕、六氯环己烷、毒杀芬和氯苯进行了测定。S-多氯联苯在鳕鱼肌肉中的含量为0.0037 mg/kg(湿重)，在雄海豹脂肪中的含量为0.68 mg/kg，在熊脂肪中的含量为4.5 mg/kg。三氯和四氯多氯联苯同系物是鱼类中的主要多氯联苯，而环海豹脂肪和北极熊脂肪中的五氯/六氯和六氯/七氯同系物分别占主导地位。在海豹脂中检测到的氯丹化合物是环氧氯丹、顺式和反式九氯、顺式氯丹以及九种工业氯丹的次要成分，包括九氯-III(一种九氯异构体)。毒杀芬和六六六是鳕鱼肌肉中的主要有机氯，平均浓度分别为0.018 mg/kg和0.010 mg/kg。S-氯/S-多氯联苯的比率从鱼肌肉和熊脂肪中的0.6到海豹脂肪中的0.7-0.9不等，远高于在更南端的海洋环境中观察到的，这表明北极地区的氯丹输入比例更大。
Polychlorinated biphenyl congeners (S-PCB) and chlordane-related compounds (S-CHLOR) as well as DDT, hexachlorocyclohexane, toxaphene, and chlorobenzenes were determined in pooled arctic cod (Boreogadus saida) muscle and polar bear (Ursus maritimus) fat and in the blubber and liver of 59 ringed seals (Phoca hispida) from the east-central Canadian Arctic. S-PCB concentrations ranged from 0.0037 mg/kg (wet wt) in cod muscle to 0.68 mg/kg in male seal blubber and 4.50 mg/kg in bear fat. Tri- and tetrachloro PCB homologues were the dominant PCBs in fish, while pentachloro/hexachloro and hexachloro/heptachloro congeners predominated in ringed seal blubber and polar bear fat, respectively. Chlordane compounds detected in seal blubber were oxychlordane, cis- and trans-nonachlor, and cis-chlordane as well as nine minor components of technical chlordane, including nonachlor-III (a nonachlor isomer). Toxaphene and HCH isomers were the major organochlorines in cod muscle with mean concentrations of 0.018 and 0.010 mg/kg, respectively. S-CHLOR/S-PCB ratios ranged from 0.6 in fish muscle and bear fat to 0.7-0.9 in seal blubber, much higher than observed in more southerly marine environments, suggesting a proportionally greater input of chlordane into the Arctic.