Therefore, the studies which have been used only GC/flame ionization detection (FID) and mass spectrometry (MS) so far had limitations for the identification of odor-active compounds and their sources. Recently, thermal desorption – cryofocusing GC/FID/olfactometry which combines two detectors, olfactometry and flame ionization detector simultaneously, has been effectively applied to the management of odor-active compounds [12]