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Table 1 Retention time, linear retention index, area normalization percent content of the volatile components in jujube extract identified by the S3DE/GC–MS and confirmative ion and quantitative ion of the selected compound for quantitative analysis

From: Steam distillation/drop-by-drop extraction with gas chromatography–mass spectrometry for fast determination of volatile components in jujube (Ziziphus jujuba Mill.) extract

No.

RT

Compounds

Area normalization percent content (%)

Identification method

LRI

Confirmative ion

Quantitative ion

1

9.887

2-Methyl-1-propanol

3.17

MS

–

–

–

2

11.148

1-Butanol

0.25

RI, MS, ST

1144

–

–

3

12.792

3-Methyl-1-butanol

8.45

RI, MS, ST

1207

70, 55

55

4

13.748

Ethyl capronate

0.07

RI, MS, ST

1243

–

–

5

13.987

1-Pentanol

0.14

RI, MS, ST

1252

–

–

6

15.818

4-Methyl-2-hexanol

0.04

RI, MS

1321

–

–

7

16.372

Ethyl heptanoate

0.06

RI, MS, ST

1341

–

–

8

16.705

1-Hexanol

0.54

RI, MS, ST

1354

84, 69

69

9

17.204

1,2-Dimethyl-cyclopent-2-enecarboxylic acid

0.12

RI, MS

1372

–

–

10

19.046

Ethyl caprylate

0.07

RI, MS, ST

1443

–

–

11

19.371

1-Heptanol

0.28

RI, MS, ST

1455

–

–

12

19.452

Acetic acid

0.13

RI, MS, ST

1458

–

–

13

20.087

Furfural

0.55

RI, MS, ST

1483

96, 95

96

14

20.305

2-Ethyl-1-hexanol

0.08

RI, MS, ST

1491

–

–

15

20.409

Ethyl 7-octenoate

0.06

RI, MS

1495

–

–

16

21.169

1-(2-Furanyl)-ethanone

0.13

RI, MS, ST

1526

–

–

17

21.527

Ethyl nonanoate

0.02

RI, MS, ST

1540

–

–

18

21.648

Propanoic acid

0.06

RI, MS

1545

–

–

19

21.849

Benzaldehyde

0.12

RI, MS, ST

1553

–

–

20

22.022

1-Octanol

0.22

RI, MS, ST

1560

–

–

21

22.367

2-Methyl-propanoic acid

0.05

RI, MS, ST

1574

–

–

22

22.917

5-Methyl-2-furan-carboxaldehyde

0.17

RI, MS, ST

1596

–

–

23

23.021

Hexadecane

0.02

RI, MS, ST

1600

–

–

24

23.125

Methyl caprate

0.05

RI, MS, ST

1604

–

–

25

23.845

Butanoic acid

0.06

RI, MS, ST

1635

–

–

26

24.124

Ethyl caprate

0.39

RI, MS, ST

1646

155, 101

101

27

24.239

Menthol

0.40

RI, MS, ST

1651

138, 128

128

28

24.359

1-Nonanol

0.08

RI, MS, ST

1656

–

–

29

24.676

2-Furanmethanol

0.30

RI, MS, ST

1670

98, 81

98

30

25.121

Diethyl succinate

0.02

RI, MS, ST

1688

–

–

31

26.082

5-Methyl-2-Furanmethanol

0.04

RI, MS

1730

–

–

32

26.394

Pentanoic acid

0.10

RI, MS, ST

1744

–

–

33

26.859

1,2-Dimethyl-4-oxocyclohex-2-enecarboxaldehyde

0.03

RI, MS

1765

–

–

34

26.921

1-Decanol

0.02

RI, MS

1767

–

–

35

27.153

Naphthalene

0.02

RI, MS

1778

–

–

36

27.248

Methyl phenylacetate

0.07

RI, MS, ST

1782

–

–

37

27.808

Ethyl phenylacetate

0.39

RI, MS, ST

1807

164, 91

91

38

27.901

Methyl laurate

0.24

RI, MS, ST

1811

–

–

39

28.505

Phenethyl acetate

0.40

RI, MS, ST

1839

–

–

40

28.672

Damascenone

0.14

RI, MS, ST

1847

–

–

41

28.765

Ethyl laurate

4.03

RI, MS, ST

1851

183, 101

101

42

29.639

1-Methyl-naphthalene

0.09

RI, MS

1891

–

–

43

30.003

Ethyl 3-phenylpropionate

0.33

RI, MS, ST

1909

178, 104

104

44

30.493

Phenylethyl alcohol

0.71

RI, MS, ST

1932

122, 91

91

45

30.919

5-Butyldihydro-2(3H)-furanone

0.08

RI, MS

1953

–

–

46

31.013

Heptanoic acid

0.38

RI, MS, ST

1958

87, 73

73

47

31.2

Isobutyl laurate

0.08

RI, MS

1967

–

–

48

32.001

4-hydroxy-4-methyl-4H-naphthalen-1-one

0.15

RI, MS

2006

–

–

49

32.251

Methyl myristate

0.05

RI, MS, ST

2019

–

–

50

33.000

Ethyl myristate

2.68

RI, MS, ST

2057

101, 88

88

51

33.156

Octanoic acid

0.79

RI, MS, ST

2065

73, 60

73

52

33.364

Isoamyl laurate

0.06

RI, MS

2075

–

–

53

33.666

Ethyl tetradecenoate (I)

0.09

RI, MS

2090

–

–

54

33.791

Ethyl tetradecenoate (II)

2.43

RI, MS

2097

–

–

55

33.947

Ethyl tetradecenoate (III)

0.02

RI, MS

2105

–

–

56

34.54

6,10,14-Trimethyl-2-pentadecanone

0.19

RI, MS

2136

–

–

57

34.967

Ethyl pentadecanoate

0.13

RI, MS, ST

2159

–

–

58

35.217

Nonanoic acid

0.25

RI, MS, ST

2172

–

–

59

36.216

Methyl hexadecanoate

0.27

RI, MS, ST

2226

–

–

60

36.882

Ethyl hexadecanoate

6.32

RI, MS, ST

2263

101, 73

101

61

37.006

Methyl (Z)-9-hexadecenoate

0.12

RI, MS

2270

–

–

62

37.131

Decanoic acid

5.08

RI, MS, ST

2276

129, 73

73

63

37.412

Ethyl hexadecenoate (I)

3.50

RI, MS

2292

–

–

64

37.652

Ethyl hexadecenoate (II)

0.13

RI, MS

2305

–

–

65

37.724

Ethyl hexadecenoate (III)

5.06

RI, MS

2309

–

–

66

38.13

Dimethyl phthalate

0.25

RI, MS

2333

–

–

67

38.682

Ethyl heptadecanoate

0.07

RI, MS, ST

2364

–

–

68

39.054

Undecanoic acid

0.17

RI, MS, ST

2386

–

–

69

40.524

Ethyl octadecanoate

0.23

RI, MS, ST

2466

–

–

70

40.94

Dodecanoic acid

27.04

RI, MS, ST

2489

200, 171

200

71

41.398

Ethyl oleate

0.30

RI, MS, ST

2512

264, 222

264

72

41.98

Ethyl linoleate

0.35

RI, MS, ST

2540

109, 95

109

73

42.542

Isobutyl phthalate

2.90

RI, MS

2566

–

–

74

45.716

Tetradecanoic acid

7.64

RI, MS

2698

–

–

75

46.382

Dibutyl phthalate

2.91

RI, MS

2721

–

–

76

47.173

Z-7-Tetradecenoic acid

7.57

RI, MS

2747

–

–

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