Table 2.

Odour thresholds and odour activity values (OAV) of selected odour-active compounds in oil after 15 days of autoxidation; units are ng compound per gram oil.

Odourant	Odour threshold (ng/g oil)	OAV1
		PHVO2	LSO3	CSO4	WO5	Flax Oil	FO6	CLO7
Acetaldehyde	0.22a	-	16231	26482	41197	63535	69791	84980
Propanal	3600b	0.1	0.6	0.8	1.8	3.5	4.0	4.6
2,3-Pentanedione	0.3c	-	137	129	277	261	358	640
Hexanal	276c	1.8	5.0	2.7	2.4	4.8	4.9	6.4
(E)-2-Pentenal	2300d	0.0	0.1	0.2	0.5	1.6	1.2	1.2
Acetic acid	124c	21	19	22	38	69	134	161
(E,E)-2,4-Heptadienal	10000d	0.1	1.0	1.8	2.4	6.2	9.5	5.6

¹OAV = (odourant concentration) / (odourant threshold in oil).

²PHVO, partially hydrogenated vegetable oil.

³LSO, low α-linolenic acid soybean oil.

⁴CSO, commodity soybean oil.

⁵WO, walnut oil.

⁶FO, fish oil.

⁷CLO, cod liver oil.

^a(Curioni & Bosset, 2002).

^b(Genot, Meynier, & Riaublanc, 2003).

^c(Chetschik, Granvogl, & Schieberle, 2010).

^d(Jacobsen, 2010).