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. Author manuscript; available in PMC: 2018 Jun 20.
Published in final edited form as: Environ Sci Technol. 2017 May 26;51(12):7197–7207. doi: 10.1021/acs.est.6b06413

Figure 2.

Figure 2

IM-MS spectra for representative petroleum substances. The figure depicts IM-MS spectra (m/z vs drift time, feature abundance is highlighted by color intensity) for each two representative of OGO, SRGO, VHGO, and HFO.