Chlorine isotope fractionation of a semi-volatile organochlorine compound during preparative megabore-column capillary gas chromatography.
J Chromatogr A
; 1103(1): 133-8, 2006 Jan 20.
Article
em En
| MEDLINE
| ID: mdl-16309691
ABSTRACT
Chlorine isotope fractionation during preparative capillary gas chromatography (pcGC) was investigated using 1,1,1-trichloro-2,2-bis(p-chlorophenyl)ethane (DDT) as a model compound for semi-volatile organochlorine (OCl) molecules. Chlorine isotope analysis by thermal ionization mass spectrometry revealed no significant alteration of the chlorine isotope composition when the whole peaks were collected in pcGC (delta37Cl -3.2 per thousand versus -3.6 per thousand for the unprocessed DDT, +/-0.5 per thousand SD). However, distinct isotope fractionations were measured for the front (delta37Cl -5.1 per thousand) and tail (delta37Cl -1.8 per thousand) segments of partially collected samples. Isolation of individual OCls by pcGC enables accurate off-line chlorine isotope analysis, and thus facilitates the investigation of naturally occurring OCls.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cloro
/
Cromatografia Gasosa
/
DDT
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Chromatogr A
Ano de publicação:
2006
Tipo de documento:
Article