Table 2 Composition and content of volatile compounds in pit mud.

From: Analysis of microbial community structure and volatile compounds in pit mud used for manufacturing Taorong-type Baijiu based on high-throughput sequencing

Compound type

No

Compound name

Retention index

Retention time/min

Relative Content/%

Pit mud from F-S

Pit mud from G-Z

Pit mud from H-X

Pit mud from I-D

Pit mud from F-S

Pit mud from G-Z

Pit mud from H-X

Pit mud from I-D

Esters

1

Ethyl caproate

984

–

7.93

7.29

7.80

–

3.94

0.06

9.23

2

Ethyl heptanoate

1083

–

10.819

10.598

9.866

–

0.14

0.06

0.65

3

Ethyl 2-hydroxypropionate

848

8.509

11.099

10.896

10.221

5.43

5.65

1.05

0.35

4

Butyl caproate

1183

11.137

12.575

12.461

12.054

0.55

0.12

0.05

0.7

5

Hexyl butyrate

1183

11.25

–

–

12.122

0.17

–

–

0.21

6

Ethyl caprylate

1183

11.863

13.023

12.929

12.586

1.47

0.64

0.16

3.07

7

Isoamyl caproate

1218

12.562

–

–

13.095

0.1

–

–

0.63

8

Butyl lactate

1047

14.137

–

–

–

0.46

–

–

–

9

Amyl hexanoate

1282

–

–

–

14.192

–

–

–

0.66

10

Propyl caprylate

1282

–

–

–

14.345

–

–

–

0.06

11

Butyl 2-hydroxypropanoate

848

–

14.65

–

–

–

0.17

–

–

12

Ethyl nonanoate

1282

–

–

–

14.665

–

–

–

0.12

13

2-Ethylbutyric acid, 4-heptyl ester

1353

–

–

–

15.581

–

–

–

0.05

14

Hexyl hexanoate

1381

15.856

16.095

16.073

15.987

0.3

0.27

0.27

10.68

15

Heptyl acetate

1381

–

–

–

16.1

–

–

–

1.04

16

Ethyl caprate

1381

16.362

16.537

16.522

16.444

0.14

0.33

0.1

0.44

17

Diethyl succinate

1151

17.063

17.182

17.169

17.114

0.34

0.33

0.08

0.02

18

Ethyl methoxyacetate

1159

17.734

17.816

17.809

17.764

0.28

0.24

0.04

0.07

19

Ethyl phenylacetate

1259

18.739

18.791

18.782

18.755

0.67

0.46

0.3

0.26

20

N-hexyl caprylate

1580

–

–

–

19.049

–

–

–

1.75

21

Furfuryl acetate

1406

–

–

–

19.86

–

–

–

0.05

22

Ethyl 3-Phenylpropionate

1359

20.122

20.136

20.134

20.122

0.75

0.33

0.29

0.3

23

Caproic acid 4-octyl ester

984

–

–

20.209

–

–

–

0.04

–

24

Allyl 2-ethylbutyrate

1019

–

–

20.331

20.321

–

–

0.2

0.08

25

Ethyl methyl-4-pentenoate

920

20.332

20.22

–

–

0.27

0.04

–

–

26

Caproic acid 2,2-Dimethylhexanoic acid

1197

–

20.338

–

–

–

0.1

–

–

27

Octyl pelargonate

1878

–

–

–

20.383

–

–

–

0.1

28

Octyl octanoate

1779

–

–

–

21.665

–

–

–

0.07

29

Ethyl tetradecanoate

1779

22.134

22.136

22.134

21.537

0.16

0.18

0.14

0.16

30

Ethyl pentadecanoate

1878

24.365

22.784

22.785

22.791

0.24

0.09

0.1

0.04

31

Ethyl 13-methyl-tetradecanoate

–

–

22.968

–

–

–

0.13

–

–

32

Ethyl tridecanoate

–

–

–

22.969

–

–

–

0.11

–

33

Ethyl hexadecanoate

1978

24.549

24.549

24.548

22.974

0.91

0.77

0.49

0.78

34

9-Hexadecenoicacid, ethylester

1986

–

–

–

24.86

–

–

–

0.04

35

Ethyl 9-octadecenoic acid

2185

26.989

26.986

–

26.995

0.26

0.1

–

0.13

36

Ethyl 9, 12-octadecadienoic acid

2193

27.486

27.486

–

–

0.34

0.21

–

–

37

Ethylene acetate

2489

28.027

–

–

–

0.27

–

–

–

38

Dibutyl phthalate

2037

29.358

–

–

–

0.23

–

–

–

Alcohols

1

1-Butanol

662

–

4.079

–

–

–

0.63

–

–

2

3-Methyl-1-butanol

697

–

6.945

–

–

–

0.37

–

–

3

1-Hexanol

2.56

9.173

11.314

11.142

10.505

2.56

1.83

0.41

0.95

4

1-Octanol

1059

14.929

15.253

–

15.058

0.31

0.15

–

0.18

5

6-Hendecanol

1277

17.355

–

–

–

0.09

–

–

–

6

1-Decyl alcohol

1258

–

–

–

18.348

–

–

–

0.04

7

Benzyl alcohol

1036

20.044

–

–

–

0.15

–

–

–

8

Phenethyl alcohol

1136

20.506

20.514

20.513

20.489

1.31

1.75

0.64

0.18

9

Triethylene glycol

1255

25.508

–

–

–

0.09

–

–

–

Acids

1

Acetic acid

576

12.69

13.387

13.312

13.033

3.76

3.65

2.15

1.1

2

Propionic acid

676

–

14.95

14.903

14.759

–

0.06

0.58

0.07

3

2-Methylpropionic acid

711

15.122

15.414

15.381

15.25

1.45

0.69

0.54

0.06

4

Butyric acid

775

16.186

16.37

16.341

16.28

16.83

12.11

12.53

1.77

5

2-Methylbutyric acid

775

–

–

16.45

–

–

–

0.01

-

6

3-Methylbutyric acid

811

16.43

17.012

16.994

16.936

0.06

1.9

2.45

0.28

7

3-Methylpentanoic acid

811

16.887

–

–

–

1.94

–

–

–

8

Valeric acid

875

17.966

18.025

18.009

17.983

2.78

3.06

11.28

0.93

9

α-Methyl phenylpropionic acid

–

18.805

–

–

–

0.05

–

–

–

10

4-Methylpentanoic acid

910

18.918

18.945

18.939

–

0.14

0.18

0.19

–

11

2-Methylpentanoic acid

910

–

–

18.414

–

–

–

0.04

–

12

Hexanoic acid

974

19.52

19.538

19.544

19.524

43.82

50.43

50.63

39.99

13

Heptanoic acid

1073

20.932

20.93

20.927

20.926

1.04

1.52

4.25

4.72

14

Octanoic acid

1173

22.27

22.269

22.268

22.276

1.86

2.22

3.57

14.36

15

Nonanoic acid

1272

23.542

23.538

23.539

23.541

0.1

0.07

0.15

0.44

16

2-Phenethyl hexanoic acid

1657

–

–

–

23.66

–

–

–

0.19

17

Capric acid

1372

24.755

24.751

24.751

24.755

0.09

0.15

0.18

0.79

18

Benzoic acid

1150

26.495

26.597

26.596

–

0.33

0.11

0.11

–

19

Phenylacetic acid

–

–

27.892

27.891

–

–

0.07

0.08

–

20

Cis10-heptadecenoic acid

2075

–

–

–

27.789

–

–

–

0.14

21

Tetradeconic acid

1769

29.209

–

–

–

0.12

–

–

–

22

Palmitic acid

1968

32.198

32.198

32.197

–

2.36

0.14

0.11

–

Others

1

D-limonene

1018

–

6.055

–

–

–

0.16

–

–

2

Tetramethylpyrazine

1121

–

13.758

13.681

–

–

0.38

0.14

–

3

Cresol

1203

–

21.118

–

–

–

0.05

–

–

4

Phenol

901

21.724

21.723

21.72

21.721

0.19

0.32

0.3

0.32

5

P-methylphenol

1014

22.666

22.664

22.659

22.663

1.49

2.17

4.77

0.82

6

3-Methylphenol

1014

–

–

–

22.755

–

–

–

0.03

7

2,4-Di-tert-butylphenol

1555

–

–

–

25.224

–

–

–

0.16

Back to article page