Identified odor-active compounds mainly contain “oxygen.” They were mostly alcohols, aldehydes, and acids. These compounds had over 90% similarity. The US National institute of Standards and Technology (NIST) and Wiley (7th edition) were used as standard spectrum libraries. To ensure the identification, standard chemicals and standard retention indices were used. Fig. 10 shows mass spectra between sample and standard library. It shows two odor-active compounds (A and B) among 10 identified odor-active compounds. Identified odor-active compounds are confidential since this study was supported by a company (identified odor-active compounds with only their groups in Table 4).