ORGANOCHLORINE CONTAMINANTS IN ARCTIC MARINE FOOD-CHAINS - IDENTIFICATION, GEOGRAPHICAL-DISTRIBUTION, AND TEMPORAL TRENDS IN POLAR BEARS
ORGANOCHLORINE CONTAMINANTS IN ARCTIC MARINE FOOD-CHAINS - IDENTIFICATION, GEOGRAPHICAL-DISTRIBUTION, AND TEMPORAL TRENDS IN POLAR BEARS
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DOI：
10.1021/es00174a011
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发表时间：
1988-09-01
影响因子：
11.4
通讯作者：
SCHWEINSBURG, RE
中科院分区：
文献类型：
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作者：
NORSTROM, RJ;SIMON, M;SCHWEINSBURG, RE
通过分析1982年至1984年期间从12个区域收集的北极熊（Ursus maritimus）组织，测定了有机氯（C）化合物对加拿大北极和亚北极海洋生态系统的污染。通过高分辨率气相色谱-质谱法确定了多氯联苯同系物（S-PCB）、氯丹（S-CHLOR，主要是羟氯丙烷）、滴滴涕及其代谢物（S-DDT）、氯苯（S-CBz）、六氯环己烷异构体（S-HCH）和狄氏剂。工业氯丹中的一种九氯异构体-九氯-三首次被确定为一种环境污染物。S-PCB和S-CHLOR占脂肪组织中有机氯总量的80%以上。六种多氯联苯同系物（国际化联编号99、153、138、180、170和194）约占北极熊体内S-PCB的93%。大多数有机碳的水平最低的高北极，中间的巴芬湾，最高的哈德逊湾。α的水平-在受地表径流影响的地区，六氯环己烷的浓度升高。与1969年以来这些地区存档的脂肪组织相比，1984年在哈德逊湾和巴芬戴采集的熊的脂肪组织中，三氯异氰尿酸的含量高出四倍，其他有机氯化合物的含量高出两倍;三氯滴滴涕的含量没有变化。
Contamination of Canadian arctic and subarctic marine ecosystems by organochlorine (C) compounds was measured by analysis of polar bear (Ursus maritimus) tissues collected from 12 zones between 1982 and 1984. PCB congeners (S-PCB), chlordanes (S-CHLOR, mainly oxychlordane), DDT and metabolites (S-DDT), chlorobenzenes (S-CBz), hexachlorocyclohexane isomers (S-HCH), and dieldrin were identified by high-resolution gas chromatography-mass spectrometry. Nonachlor-III, a nonachlor isomer in technical chlordane, was positively identified for the first time as an environmental contaminant. S-PCB and S-CHLOR accounted for > 80% of the total organochlorines in adipose tissue. Six PCB congeners (IUPAC numbers 99, 153, 138, 180, 170, and 194) constituted approximately 93% of S-PCB in polar bears. Levels of most OCs were lowest in the high Arctic, intermediate in Baffin Bay, and highest in Hudson Bay. Levels of .alpha.-HCH were elevated in zones influenced by surface runoff. Levels of S-CHLOR were four times higher and levels of the other OCs were two times higher in adipose tissue of bears from Hudson Bay and Baffin Day in 1984 than in adipose tissue archived since 1969 from these areas; levels of S-DDT did not change.