Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1019, Issue 1-2, Pages 143-156Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2003.07.007
Keywords
thermal desorption; gas chromatography; comprehensive two-dimensional; polychlorinated biphenyls; polybrominated diphenyl ethers; pesticides
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The separation of 38 toxic and predominant polychlorinated biphenyl (PCB) congeners, I I persistent halogenated pesticides, I brominated biphenyl (BB), and 8 polybrominated diphenyl ethers (PBDEs) has been optimized using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC x GC-TOFMS). A thermal desorption-programmable temperature vaporization (TD-PTV) step was used for the injection. Different column sets were investigated. and a 100% dimethylpolysiloxane (15 m x 0.25 mm W. x 0.25 mum film thickness) narrowbore capillary column coupled to a high temperature (8% phenyl)-polycarborane-siloxane (2 m x 0.10 mm i.d. x 0.10 mum film thickness) microbore column set was selected. Of the 58 compounds investigated, only one pair of PCBs was not resolved. All other analytes were either baseline separated into the chromatographic plane or were virtually separated using the deconvolution capability of the TOFMS. (C) 2003 Elsevier B.V. All rights reserved.
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