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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