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. Author manuscript; available in PMC: 2014 Jul 28.
Published in final edited form as: Environ Toxicol Chem. 2010 Nov;29(11):2450–2460. doi: 10.1002/etc.301

Figure 1.

Figure 1

Example chromatograms of ketone or quinone-substituted polycyclic aromatic hydrocarbons identified in several standard reference material (SRM) matrices: SRM 2977 (mussel tissue), SRM 1944 (sediment), SRM 1649b (urban dust), SRM 1650b (diesel particulate matter) and SRM 1975 (diesel extract). Each chromatogram represents a selected ion monitoring (SIM) scan from gas chromatography-mass spectrometry with a non polar column. A more detailed chromatogram is provided in the Supplemental Data.