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. Author manuscript; available in PMC: 2017 Mar 25.
Published in final edited form as: J Chromatogr A. 2015 Oct 26;1439:112–123. doi: 10.1016/j.chroma.2015.10.057

Figure 6.

Figure 6

Comparison of cleanup strategies. TICs are overlaid with EICs of BaP-dG analyte and clearly show that butanol enrichment is more effective at removing co-eluting background ions than protein precipitation with ethanol. The single BaP-dG peak is indicated by an arrow. Multiple peaks in the top trace (ethanol precipitation) are from coeluting contaminants.