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Table 1 The concentration of volatile compounds (free and bound) identified in Vitex doniana sweet (µg kg−1 of pulp)

From: Identification of the aroma compounds in Vitex doniana sweet: free and bound odorants

Compounds1 LR1 LR2 Free Bound
Alcohols
 3-Methyl-but-3-en-1-ol 1209 720 1046 ± 33.0a 570 ± 23.6b
 2/3-Methyl-butanol 1213 738 153 ± 11.4a 102 ± 10.6b
 (Z)-3-Hexen-1-ol 1389 858 312 ± 17.2a 23 ± 2.0b
 Hexan-1-ol 1079 872 60 ± 3.5a 33 ± 1.5b
 2,6-Dimethylcyclohexanol 1112 979 tr tr
 1-Octen-3-ol 1451 979 tr tr
 2-Phenylethanol 1911 1117 2457 ± 151.0a 97 ± 5.9b
Aldehydes
 2-Phenylethanal 1037 tr 21 ± 2.1a
 Benzaldehyde 1524 1517 tr 35 ± 3.2a
Acids
 2-Ethyl hexanoic acid 1129 tr Nd
 Acetic acid 1428 600 18 ± 2.7a 19 ± 0.8a
Esters
 Ethyl-2-methylpropionate 961 758 315 ± 26.0 Nd
 Methylbutanoate 981 723 205 ± 16.0a tr
 Ethylbutanoate 1028 803 604 ± 112.0 Nd
 1-Pentyl acetate 1170 919 37 ± 4.3 Nd
 Methyl hexanoate 1000 433 ± 45.1 Nd
 Butyl butanoate 1218 995 65 ± 5.6 Nd
 2-Heptyl acetate 1259 1040 tr tr
 Hexyl acetate 1270 1014 522 ± 101.6 Nd
 (Z)-3-Hexenyl acetate 1325 1007 125 ± 2.5a tr
 Methyl octanoate 1137 475 ± 96.0a 35 ± 1.5b
 Ethyl cinnamate 2167 1469 715 ± 117.0 Nd
Terpenes
 Limonene 1185 1030 127 ± 9.3 Nd
 (E)-β-Ocimene 1250 1156 tr Nd
 Borneol 1253 885 tr tr
 (Z)-Rose oxide 1337 40 ± 5.0 Nd
 (E)-α-Bergamotene 1415 tr Nd
 Linalool 1540 1103 5121 ± 107.0a 506 ± 19.4b
 α-Terpineol 1582 1195 216 ± 5.0a 57 ± 6.7b
 Geranial 1715 1277 114 ± 4.5 Nd
 Geraniol 1840 341 ± 13.4a 79 ± 8.6b
Ketones
 Acetophenone 1067 42 ± 6.0b 437 ± 15.6a
 4-Hydroxy-2,5-dimethyl-3(2H)-furanone 2038 1070 50 ± 2.6b 326 ± 15.0a
 ϒ-Jasmolactone 2176 Nd 186 ± 11.7
Phenol
 Guaiacol 1842 1089 Nd 231 ± 14.3
 Norisoprenoids
  Theaspirane isomer I 1280 Nd tr
  Theaspirane isomer II 1308 Nd tr
  β-Damascenone 1801 1389 tr 21 ± 1.7a
  4-Hydroxy-β-ionol 1601 Nd 162 ± 10
  β-Ionone 1933 1491 260 ± 12.0a trb
  3-Oxo-α-ionol 1938 Nd 100 ± 12.5
  4-Oxo-β-ionol 1943 Nd 141 ± 7.9
  Total 13,900 µg kg−1 3236 µg kg−1
Alcohols 29.1% 26.1%
Esters 25.2% 1.36%
Terpenes 43% 20.1%
Ketones 0.66% 29.3%
Nop. 1.91% 13.3%
  1. Mean ± SD (n = 3) with different superscript along the same row are significantly different (P < 0.05)
  2. LR1, DB-FFAP; LR2, SE-54; tr trace amount (<10 µg kg−1), Nd not detected, Nop norisoprenoids
  3. LRI linear retention index on column 1, LR2 linear retention index on column 2
  4. 1Compounds were identified by comparing their retention indices on DB-FFAP and SE-54 columns, their mass spectra, and odour notes were compared with their respective reference odorants’ data