Analysis of Volatile Components in Tremella fuciformis by Electronic Nose Combined with GC-MS

Table 3

ROAV value of 29 components in T. fuciformis from different regions.

Number	Compound name	Aroma threshold	ROAV
		(μG/L) [31, 45–50]	Hebei	Henan	Sichuan	Fujian
Alcohols
1	1-Hexanol	250	<0.1	—	—	<0.1
2	1-Octen-3-ol	1	5.5	—	—	—
3	Eucalyptol	1.3	0.22	—	—	—
4	Linalol	1.5	0.48	—	—	—
5	Pentyl alcohol	4000	<0.1	<0.1	—	<0.1
6	Isopentyl alcohol	120	—	—	—	<0.1
Aldehydes
7	Hexanal	4.5	87.97	100	100	100
8	Furfural	3000	<0.1	<0.1	—	—
9	Heptanal	3	2.07	6.19	—	—
10	Octanal	0.7	21.3	1.02	—	1.19
11	Benzeneacetaldehyde	4	<0.1	<0.1	—	—
12	Nonanal	1	37.34	3.39	1.33	22.08
13	Benzaldehyde	350	<0.1	<0.1	—	<0.1
14	Pentanal	20	3.65	0.34	<0.1	0.24
Acids
15	Acetic acid	22000	<0.1	<0.1	<0.1	<0.1
16	Nonanoic acid	3000	<0.1	—	—	—
17	Octanoic acid	500	—	—	<0.1	—
18	Pentanoic acid	3000	—	—	—	—
19	Heptanoic acid	100	—	—	0.25	—
20	Hexanoic acid	3000	—	—	—	<0.1
Esters
21	Butyrolactone	0.88	100	—	22.97	2.6
22	gamma-Butyrolactone	100	0.81	—	—	—
23	n-Hexyl formate	19800	—	<0.1	—	<0.1
Hydrocarbons
24	Dodecane	2040	<0.1	<0.1	<0.1	<0.1
25	Tetradecane	1000	<0.1	<0.1	—	<0.1
26	Hexadecane	300	<0.1	<0.1	<0.1	<0.1
27	2-Carene	0.01	14.47	—	—	—
Others
28	2-Undecanone	255	—	<0.1	—	—
29	p-(1-Propenyl)anisole	15	—	—	<0.1	—

Note. “—”means not detected.