Table 3. Additional Possible Minor Impact VOCs in Group 3 That Are “Masked” by the Group 1 and 2 Odorants.

	GC column retention time (min)	tentative chemical ID	descriptor
group 3	2.8	methyl mercaptan	“fecal”
	18.8	para-cresol	“barnyard”
	8.3	unknown (possibly methyl butanoate)	“fruity”
	10.9	camphene	“camphor”
	13.2	1,8-cineole	“eucalyptus”
	∼14.7+	para-xylene and other alkyl benzenes	undefined
	∼10.0 to 28.0	a plethora of other terpenes beyond the above	various