Table 3 Concentrations (µg Kg⁻¹ fresh weight) and odour activity values (OAVs) of aroma-active odorants (FD ≥ 8) in raw, boiled and fried giant snail (A. fulica)

1

663

2-Methylbutanal

nd

16.8 ± 1.0

30.0 ± 1.0

1^a

nd

16

30

2

820

2-Methylpyrazine

nd

100.3 ± 0.7

126.7 ± 0.4

60^b

nd

1.7

2.1

3

906

2,5-Dimethylpyrazine

nd

40.0 ± 1.4

45.1 ± 1.5

800^b

nd

< 1

< 1

4

907

2-Furanmethanethiol

nd

nd

4.7 ± 0.1

0.005^b

nd

nd

940

5

922

2-Acetyl-1-pyrroline

nd

nd

123.6 ± 2.2

0.1^a

nd

nd

1236

6

963

Benzaldehyde

13.5 ± 0.0

16.4 ± 0.1

20.0 ± 0.1

350^a

< 1

< 1

< 1

7

977

1-Octen-3-one

1.2 ± 0.0

0.9 ± 0.0

0.1 ± 0.0

0.005^a

240

180

20

8

1006

Octanal

45.9 ± 1.0

63.2 ± 1.0

78.9 ± 2.5

8^a

5.7

7.9

9.9

9

1020

2-Acetylthiazole

nd

5.7 ± 0.1

15.9 ± 0.1

10^a

nd

< 1

1.5

10

1031

2-Acetylpyridine

nd

70.0 ± 2.1

102 ± 1.5

19^a

nd

3.7

5.4

11

1067

4-Hydroxy-2,5-dimethyl-3(2H) furanone

nd

nd

46.5 ± 1.0

5^a

nd

nd

9.3

12

1088

2-Methoxyphenol

nd

nd

12.9 ± 0.1

2.5^a

nd

nd

5.2

13

1107

3-Hydroxy-4,5-dimethyl-2(5H) furanone

nd

6.1 ± 0.1

11.2 ± 1.4

0.001^a

nd

6100

11,200

14

1457

β-Ionone

5.4 ± 0.1

0.7 ± 0.0

nd

0.03^c

180

23

nd

15

1534

β-Iso-methyl ionone

12.2 ± 0.1

1.1 ± 0.0

0.9 ± 0.0

nd

nd

nd

nd