their retention indices were same as the peaks found in GC/FID/O analysis. Nine of twelve compounds were detected in GC/AED oxygen analysis. No peaks were found in the GC/AED sulfur and nitrogen analysis. GC/MS analysis was performed to identify the name of odor-active compounds. Fig. 9 shows total ion chromatogram of odor sample by using GC/MS with odor peaks. The red lines indicate the odor peaks identified in GC/FID/O analysis.