Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1218, Issue 21, Pages 3224-3232Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2011.01.013
Keywords
Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs); Brominated polycyclic aromatic hydrocarbons (Br-PAHs); Comprehensive two-dimensional gas chromatography (GC x GC); High resolution time-of-flight mass spectrometry (HRTOF-MS)
Funding
- Grants-in-Aid for Scientific Research [22710021, 23310011, 21580408] Funding Source: KAKEN
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A method for the analysis of chlorinated and brominated polycyclic aromatic hydrocarbon (Cl-/Br-PAHs) congeners in environmental samples, such as a soil extract, by comprehensive two-dimensional gas chromatography coupled to a high resolution time-of-flight mass spectrometry (GC x GC-HRTOF-MS) is described. The GC x GC-HRTOF-MS method allowed highly selective group type analysis in the two-dimensional (20) mass chromatograms with a very narrow mass window (e.g. 0.02 Da), accurate mass measurements for the full mass range (m/z 35-600) in GC x GC mode, and the calculation of the elemental composition for the detected Cl-/Br-PAH congeners in the real-world sample. Thirty Cl-/Br-PAHs including higher chlorinated 10 PAHs (e.g. penta, hexa and hepta substitution) and ClBr-PAHs (without analytical standards) were identified with high probability in the soil extract. To our knowledge, highly chlorinated PAHs, such as C14H3Cl7 and C16H3Cl7, and ClBr-PAHs, such as C14H7Cl2Br and C16H8ClBr, were found in the environmental samples for the first time. Other organohalogen compounds; e.g. polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs), and polychlorinated dibenzofurans (PCDFs) were also detected. This technique provides exhaustive analysis and powerful identification for the unknown and unconfirmed Cl-/Br-PAH congeners in environmental samples. (C) 2011 Elsevier B.V. All rights reserved.
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