Chlordane Enantiomers and Temporal Trends of Chlordane Isomers in Arctic Air

A 14-year data set (1984−1998) for chlordane compounds in arctic air was examined to discern temporal trends. trans-Chlordane (TC), cis-chlordane (CC), and trans-nonachlor (TN) declined significantly (p < 0.001−0.02), with apparent times for 50% reduction of 4.9−9.7 y. The isomer fraction of TC =...

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Bibliographic Details
Published in:Environmental science & technology 2002-02, Vol.36 (4), p.539-544
Main Authors: Bidleman, Terry F, Jantunen, Liisa M. M, Helm, Paul A, Brorström-Lundén, Eva, Juntto, Sirkka
Format: Article
Language:English
Subjects:
Air
Air Pollutants - analysis
Applied sciences
Arctic Regions
Atmospheric pollution
Chlordan - analysis
Chlordan - chemistry
Environmental Monitoring
Exact sciences and technology
Insecticides - analysis
Insecticides - chemistry
Isomerism
isomers
Pesticides
Pollution
Pollution sources. Measurement results
Retrospective Studies
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Summary:A 14-year data set (1984−1998) for chlordane compounds in arctic air was examined to discern temporal trends. trans-Chlordane (TC), cis-chlordane (CC), and trans-nonachlor (TN) declined significantly (p < 0.001−0.02), with apparent times for 50% reduction of 4.9−9.7 y. The isomer fraction of TC = (TC/(TC + CC) also declined significantly (p < 0.001−0.014) over the same time period. The enantiomeric composition of TC and CC was determined in air samples collected at arctic stations in Canada (1993−1996), Russia (1994), and Finland (1998), and a temperate station on the Swedish west coast (1998). Enantiomer fractions, EF = (+)/[(+) + (−)], were significantly different from measured EFs of racemic standards (0.498−0.501) at all stations for TC (p < 0.001) and two stations for CC (p < 0.001 to
ISSN:0013-936X
1520-5851
DOI:10.1021/es011142b