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Ultra resolution chemical fingerprinting of dense non-aqueous phase liquids from manufactured gas plants by reversed phase comprehensive two-dimensional gas chromatography

McGregor, Laura A and Gauchotte-Lindsay, Caroline and Daéid, Niamh Nic and Thomas, Russell and Daly, Paddy and Kalin, Robert M (2011) Ultra resolution chemical fingerprinting of dense non-aqueous phase liquids from manufactured gas plants by reversed phase comprehensive two-dimensional gas chromatography. Journal of Chromatography A, 1218 (29). pp. 4755-4763. ISSN 0021-9673

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Abstract

Ultra resolution chemical fingerprinting of dense non-aqueous phase liquids (DNAPLs) from former manufactured gas plants (FMGPs) was investigated using comprehensive two-dimensional gas chromatography coupled with time of flight mass spectrometry (GC×GC TOFMS). Reversed phase GC×GC (i.e. a polar primary column coupled to a non-polar secondary column) was found to significantly improve the separation of polycyclic aromatic hydrocarbons (PAHs) and their alkylated homologues. Sample extraction and cleanup was performed simultaneously using accelerated solvent extraction (ASE), with recovery rates between 76% and 97%, allowing fast, efficient extraction with minimal solvent consumption. Principal component analysis (PCA) of the GC×GC data was performed in an attempt to differentiate between twelve DNAPLs based on their chemical composition. Correlations were discovered between DNAPL composition and historic manufacturing processes used at different FMGP sites. Traditional chemical fingerprinting methods generally follow a tiered approach with sample analysis on several different instruments. We propose ultra resolution chemical fingerprinting as a fast, accurate and precise method of obtaining more chemical information than traditional tiered approaches while using only a single analytical technique.

Item type: Article
ID code: 33451
Notes: Copyright © 2011 Elsevier B.V. All rights reserved.
Keywords: chemical fingerprinting, reversed polarity, GC x GC TOFMS, pan, environmental forensics, DNAPL, manufactured gas plant, GC X GC, sites, contaminated soils, analytical tool, oil, Chemistry
Subjects: Science > Chemistry
Department: Faculty of Engineering > Civil and Environmental Engineering
Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 19 Sep 2011 10:21
    Last modified: 17 Jul 2013 10:52
    URI: http://strathprints.strath.ac.uk/id/eprint/33451

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