Table 3. Odour perception thresholds (OPT) and odour descriptors (45–48), and aroma group affiliation of the main odourants found in Malvazija istarska and Chardonnay monovarietal wines produced in 2013 and 2014.

Odourant	OPT/(µg/L)	Odour descriptor	Aroma group
Linalool	6	floral	varietal terpenic, floral
Citronellol	18	citrus	varietal terpenic, varietal fruity
Nerol	15	orange flowers, rose	varietal terpenic, floral
Geraniol	30	roses, geranium	varietal terpenic, floral
β-Damascenone	0.05	sweet, stewed apple, plum	varietal fruity, sweet
1-Hexanol	1620	fresh cut grass	green
cis-3-Hexen-1-ol	70	grass, herbaceous	green
2-Phenylethanol	10000	rose, talc, honey	floral
Hexanoic acid	420	cheese, rancid	fatty
Octanoic acid	500	cheese, rancid, fat	fatty
Decanoic acid	1000	rancid, waxen, plasticine	fatty
Ethyl isobutyrate	15	berry, blackberry	sweet, berry fruit
Ethyl butyrate	20	fruity	fermentative fruity
Ethyl 2-methylbutyrate	1	sweet fruit	sweet, berry fruit
Ethyl 3-methylbutyrate	3	berry, blackberry	sweet, berry fruit
Ethyl hexanoate	5	green apple	fermentative fruity
Ethyl octanoate	2	sweet, banana, pineapple	sweet, fermentative fruity
Ethyl decanoate	200	grape, fruit	fermentative fruity
Isoamyl acetate	30	banana	fermentative fruity
2-Phenethyl acetate	250	fruity, honey, floral	fermentative fruity, floral
Ethyl cinnamate	1	fruity, honey, cinnamon	sweet, fermentative fruity