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Table 2 Peak assignment for GC-MS profiles of essential oils extracted by microwave-assisted hydrodistillation (MWHD) from Lippia alba Carvone (A) and Citral (B) chemotypes plants growing in Bucaramanga (Colombia)

From: Induction of programmed cell death in Trypanosoma cruzi by Lippia alba essential oils and their major and synergistic terpenes (citral, limonene and caryophyllene oxide)

Peak Compound LRI Relative Quantity, %
DB-5MSa DB-WAXb Carvone (A) Citral (B)
1 6-Methyl-5-hepten-2-one 986 1241 3.3
2 β-Myrcene 991 1064 0.8
3 Limonene 1034 1105 29.1 6.6
4 trans-β-Ocimene 1047 1153 0.7 0.2
5 Linalool 1100 1453 0.6 1.9
6 Citronellal 1154 1381 1.1
7 Borneol 1181 1613 0.8
8 cis-Dihydrocarvone 1203 1517 0.2
9 trans-Dihydrocarvone 1211 1537 0.2
10 Nerol 1231 1708 0.8
11 Neral 1248 1589 21.5
12 Geraniol 1252 1755 5.6
13 Carvone 1258 1653 35.0
14 Piperitone 1264 1641 2.4
15 Geranial 1275 1643 28.7
16 Piperitenone 1349 1842 4.0
17 Geranyl Acetate 1379 1662 1.5
18 β-Bourboneno 1396 1428 1.2
19 β-Elemene 1397 1496 1.0 3.0
20 trans-β-Caryophyllene 1436 1506 0.2 12.1
21 β-Gurjunene 1444 1447 0.2
22 α-Guaiene 1447 1498 1.8
23 trans-β-Farnesene 1456 1570 0.7
24 α-Humulene 1471 1580 0.1 2.7
25 γ-Gurjunene 1475 1587 0.4
26 Germacrene D 1486 1552 0.1 2.6
27 Bicyclosesquiphellandrene 1496 1624 8.2
28 Bicyclogermacrene 1509 1608 0.5
29 α-Bulnesene 1515 1627 1.4
30 Cubebol 1528 1855 0.5
31 Germacrene-4-ol 1591 1967 0.6
32 Caryophyllene Oxide 1600 1909 2.3
  1. LRI Linear retention index
  2. aLinear Retention Index experimentally determined in DB-5MS (60 m) column
  3. bLinear Retention Index experimentally determined in DB-WAX (60 m) column