Seasonal dependence of the chiral composition of α-HCH in coastal deposition at the North Sea

被引：15

作者：

Bethan, B

Dannecker, W

Gerwig, H

Hühnerfuss, H

Schulz, M

机构：

[1] Univ Hamburg, Inst Organ Chem, D-20146 Hamburg, Germany

[2] Univ Hamburg, Inst Inorgan Chem Appl & Analyt Chem, D-20146 Hamburg, Germany

来源：

CHEMOSPHERE | 2001年 / 44卷 / 04期

关键词：

enantioselective gas chromatographic separation; bulk deposition; air; seawater;

D O I：

10.1016/S0045-6535(00)00495-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The environmental pollutant alpha -HCH was analysed in seawater, air and bulk deposition samples from the North Sea. Enantioselective analyses of the sample extracts gave evidence of the change of the direction of net air-water gas transfer of the contaminant in dependence on the season. Due to warmer water surface temperatures during late summer to early autumn the equilibrium of alpha -HCH between air and water is dominated rather by volatilisation than deposition. The volatilisation of non-racemic alpha -HCH, as known to occur from seawater, changes the enantiomeric ratio in air, which is reflected in the observed ratio in rain that passes the air column. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：591 / 597

页数：7

共 26 条

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