Results and Discussion All of the chromatograms were created by using the GC Image software (Zoex). The GC×GC total ion current chromatograms (TICCs) for kerosene (top) and diesel oil (bottom) are shown in Fig.1. The X axis corresponds with the separation by the 1 st column which is based on differences in boiling point, and the Y axis corresponds with the separation by the 2 nd column which is based on differences in polarity. Also, the color in the chromatograms represents the intensity of each peak. The intensity increases from light blue to yellow and then to red. The red color shows that the compound intensity is over the settings value for the maximum intensity.