Fig. 4
PAH diagnostic ratios to differentiate and classify emission sources (petrogenic vs pyrogenic). Cross plots of a An/(An + Ph) vs. Fl/(Fl + Py), b BaA/(BaA + Ch) vs. Fl/(Fl + Py), c IP/(IP + Bghi) vs. Fl/(Fl + Py), d Fl/(Fl + Py) vs. C0/(C0 + C1) Fl + Py, e An/(An + Ph) vs. C0/(C0 + C1) Ph + An and f Fl/(Fl + Py) vs. C0/(C0 + C1) Ph + An according to Yunker et al. [63]