Table 2 The aroma compounds with OAV greater than 1 in the YCFS

From: Key compounds responsible for the flavor diversity of Yongchun Foshou oolong tea of different grades and in different seasons

Aroma compounds

CAS

Odor

Odor type

Odor threshold (μg/L)

References

OAV

SA

SB

SC

SD

AA

AB

AC

AD

linalool

78-70-6

citrus floral sweet boisde rose woody green blueberry

floral

3.8

34

54

35

38

30

27

10

15

22

2-nitroethylbenzene

6125-24-2

flower spice

flower spice

2

34

19

20

21

22

23

24

10

19

3,5-octadien-2-one

38284-27-4

ftuity fatty mushroom

fatty

0.9

34

17

41

22

39

190

130

108

154

α-ionone

127-41-3

sweet-floral odor, reminiscent of violets

floral

5.7

57

-

1

4

5

20

17

14

15

hexanal

66-25-1

pungent

 

4.5

34

16

13

13

15

4

-

12

14

heptaldehyde

111-71-7

green-herbaceous, vegetable-like odor

green

3

34

8

8

7

9

3

-

10

9

1-octanol

111-87-5

alcohol like

waxy

2.7

34

14

12

12

15

32

19

18

21

1-octen-3-ol

3391-86-4

mushroom earthy green oily fungal raw chicken

earthy

25

34

-

1

1

1

2

1

1

1

nonanal

124-19-6

waxy aldehydic rose fresh orris orange peel fatty peely

aldehydic

0.3

34

451

329

539

606

239

-

457

486

benzaldehyde

100-52-7

like almonds

fruity

42

57

2

2

1

2

3

2

2

3

dihydroactinidiolide

17092-92-1

musk coumarin

-

2.1

34

5

14

10

12

41

39

28

30

phenylacetaldehyde

122-78-1

green sweet floral hyacinth clover honey cocoa

honey-like

4

47

39

25

31

36

111

-

26

33