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2015 ; 5
(ä): 13913
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Occurrence of chiral organochlorine compounds in the environmental matrices from
King George Island and Ardley Island, west Antarctica
#MMPMID26354713
Wang P
; Zhang Q
; Li Y
; Zhu C
; Chen Z
; Zheng S
; Sun H
; Liang Y
; Jiang G
Sci Rep
2015[Sep]; 5
(ä): 13913
PMID26354713
show ga
Chiral organochlorine compounds (OCs) were measured in various environmental
matrices (air, soil and vegetation) from west Antarctica using high resolution
gas chromatography coupled with high resolution mass spectrometry (HRGC/HRMS).
They were generally detected at a global background level compared with the
previous studies. ?-HCH and PCB-183 was observed in all the matrices except
PCB-183 in two soil samples, while PCB-95, -136, -149, -174, -176 and o,p'-DDT
were detected in most air but only a few solid matrices. Enantiomeric fractions
(EFs) indicated that nonracemic residues of chiral OCs occurred in all the
matrices and a wide variation of the EF values was observed in the vegetation.
There was significant discrepancy between the EF values of PCB-183 and the
racemic values, indicating that stereoselective depletion of PCB-183 was probably
associated with the water-air exchange. The EFs values of ?-HCH were generally
lower than the racemic values but no statistical difference was obtained in all
the matrices except lichen, supporting the assumption that water-air exchange may
make influence on long-range transport of ?-HCH.