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Table 3 Concentrations, odour thresholds and odour activity values (OAVs) of key aroma compounds (FD factor ≥ 16) in cold fermented bagels

From: Characterization of the key aroma compounds in three types of bagels by means of the sensomics approach

No.

Compounds

Concentration (μg kg−1)

Threshold in starch (μg kg−1)

Odour activity values (OAVs)c

CB

BF24

BF48

CB

BF24

BF48

1

Acetic acid

300 ± 2.0c

480 ± 2.0b

510 ± 2.0a

31,140

< 1

< 1

< 1

2

2,3-Butanedione (diacetyl)

710 ± 5.1c

11,800 ± 12.0b

12,950 ± 15.5a

6.5

109

1815

1992

3

2/3-Methyl butanal

164 ± 2.1c

321 ± 2.1b

434 ± 2.0a

32a

5

10

14

4

Butanoic acid

113 ± 1.0c

201 ± 1.0b

317 ± 1.0a

100a

1

2

3

5

Acetoin

1140 ± 4.5c

1245 ± 5.0b

1276 ± 4.0a

Nf

nd

nd

nd

6

3-Methyl butanol

647 ± 3.1c

1126 ± 7.8b

1364 ± 10.0a

102

6

11

13

7

Furfural

101 ± 1.0b

126 ± 1.0a

124 ± 1.0a

Nf

nd

nd

nd

8

2-Methylpyrazine

30 ± 0.2c

54 ± 0.2b

76 ± 0.2a

Nf

nd

nd

nd

9

3-Methylbutanoic acid

64 ± 1.0c

276 ± 2.1b

314 ± 2.0a

24

3

12

13

10

Methional

16 ± 0.1c

24 ± 0.1b

43 ± 0.1a

0.27

59

89

160

11

2-Acetyl-1-pyrroline

17 ± 0.1ab

19 ± 0.1a

18 ± 0.1a

0.0073a

2329

2603

2466

12

Benzaldehyde

174 ± 3.0c

920 ± 4.5b

1121 ± 6.0a

350

< 1

3

3

13

5-Methyl-2-furanmethanol

46 ± 0.1c

52 ± 0.1b

58 ± 0.1a

11.9b

4

4

5

14

(Z)-4-Heptenal

51 ± 0.1c

135 ± 0.2b

234 ± 0.2a

3

17

45

78

15

Acetyl pyrazine

171 ± 1.0c

186 ± 1.0b

193 ± 1.0a

nf

nd

nd

nd

16

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

234 ± 2.0c

347 ± 2.1b

453 ± 3.0a

13 b

18

27

35

17

Benzyl alcohol

115 ± 1.0c

176 ± 2.0b

182 ± 2.1a

nf

nd

nd

nd

18

Phenyl acetaldehyde

15 ± 0.0b

18 ± 0.1a

17 ± 0.1a

28b

< 1

< 1

< 1

19

2-Phenyl ethanol

1101 ± 5.0c

1134 ± 5.0b

1512 ± 5.0a

125b

9

9

12

20

Octanoic acid

87 ± 2.1c

102 ± 2.0b

116 ± 2.0a

Nf

nd

nd

nd

21

4-Vinyl-2-methoxyphenol

146 ± 2.0c

305 ± 2.1b

512 ± 4.0a

18b

8

17

28

22

Vanillin

56 ± 0.1c

73 ± 0.1b

95 ± 0.1a

4.6b

12

16

21

  1. nf not found, nd not determined, CB control bagel, BF24 24 h fermented bagels, BF48 48 h fermented bagels; Mean ± SD; superscripts with different letters in a row are significantly (p < 0.05) different
  2. aReference; Zehentbauer and Grosch [48]
  3. bReference; Rychlik and Grosch [10]
  4. cOAV on the basis of odour thresholds in starch