Fig. 3From: Removal of TPH, UCM, PAHs, and Alk-PAHs in oil-contaminated soil by thermal desorptionGas chromatography chromatograms of unresolved complex mixtures (UCM) and total petroleum hydrocarbons (TPH) at a 200 °C, b 400 °C, and c 600 °C. The green, red, and blue lines indicate the chromatograms of the raw soil, 30 min treated soil, and 60 min treated soil, respectively. The area under the hump is considered as the UCMBack to article page