Table 2. Identification of volatile components from field and laboratory volatile collection.
Compounds were tentatively identified by matching their mass spectra with those found in MS Libraries (NIST11 and Wiley). The identification was verified by synthetic standards (Compound (standard)) and matching Kovats retention indices (Compound (RI)) found in literature for DB-WAX and HP-5 capillary columns.
| Chemical group | Compound(RI) | CAS | DB-WAX RI(calc) | DB-WAXRI(lib) |
|---|---|---|---|---|
| Reference compound | nonane | 111-84-2 | 900 | 900 |
| Acetate ester | isobutyl acetate | 110-19-0 | 995 | 1002 |
| Acetate ester | isoamyl acetate | 123-92-2 | 1114 | 1126 |
| Acetate ester | (Z)-3-hexenyl acetate | 3681-71-8 | 1316 | 1320 |
| Acetate ester | (Z)-2-hexenyl acetate | 56922-75-9 | 1332 | 1319 |
| Primary alcohol | 1-propanol | 71-23-8 | 1026 | 1035 |
| Primary alcohol | 1-butanol | 71-36-3 | 1122 | 1136 |
| Primary alcohol | (Z)-3-hexen-1-ol | 928-96-1 | 1382 | 1387 |
| Secondary alcohol | 3-hexanol | 623-37-0 | 1189 | 1189 |
| Secondary alcohol | 3-octanol | 589-98-0 | 1388 | 1396 |
| Dialkyl ketone | 3-hexanone | 589-38-8 | 1044 | 1042 |
| Dialkyl ketone | 2-heptanone | 110-43-0 | 1185 | 1184 |
| Dialkyl ketone | 3-octanone | 106-68-3 | 1262 | 1248 |
| Methyl ketone | 6-methyl-5-heptene-2-one | 110-93-0 | 1332 | 1341 |
| Aliphatic aldehyde | (E)-2-hexenal | 6728-26-3 | 1224 | 1218 |
| Aliphatic aldehyde | ctanal | 124-13-0 | 1280 | 1287 |
| Saturated fatty aldehyde | nonanal | 124-19-6 | 1398 | 1396 |
| Saturated fatty aldehyde | decanal | 112-31-2 | 1490 | 1498 |
| Monocarboxylic acid | acetic acid | 64-19-7 | 1410 | 1410 |
| Monocarboxylic acid | butanoic acid | 107-92-6 | 1614 | 1612 |
| Monocarboxylic acid | pivalic acid | 75-98-9 | 1566 | 1579 |
| Aaromatic hydrocarbon | toluene | 108-88-3 | 1027 | 1037 |
| Aromatic hydrocarbon | styrene | 100-42-5 | 1254 | 1254 |
| Benzaldehyde | benzaldehyde | 100-52-7 | 1537 | 1528 |
| Benzoate ester | methyl salicylate | 119-36-8 | 1783 | 1778 |
| Monoterpene | (E)-alloocimene | 14947-20-7 | 1404 | 1396 |
| Monoterpene | 3-carene | 13466-78-9 | 1148 | 1142 |
| Monoterpene | p-cymene | 99-87-6 | 1277 | 1265 |
| Monoterpene | (E)-4,8-dimethylnona-1,3,7-triene | 19945-61-0 | 1303 | 1302 |
| Monoterpene | limonene | 138-86-3 | 1211 | 1200 |
| Monoterpenoid | linalool | 78-70-6 | 1531 | 1540 |
| Monoterpene | β-myrcene | 123-35-3 | 1166 | 1165 |
| Monoterpene | (E)-β-ocimene | 3779-61-1 | 1251 | 1250 |
| Monoterpene | (Z)-β-ocimene | 3338-55-4 | 1233 | 1234 |
| Monoterpene | α-pinene | 80-56-8 | 1015 | 1015 |
| Monoterpene | γ-terpinene | 99-85-4 | 1242 | 1250 |
| Monoterpene | β-pinene | 127-91-3 | 1161 | 1136 |
| Monoterpenoid | monoterp2 | - | 1164 | - |
| Monoterpenoid | monoterp3 | - | 1230 | - |
| Monoterpenoid | monoterp4 | - | 1252 | - |
| Monoterpenoid | (Z)-4,8-dimethylnona-1,3,7-triene | - | 1262 | 1274 |
| Monoterpenoid | monoterp6 | - | 1272 | - |
| Monoterpenoid | monoterp7 | - | 1277 | - |
| Monoterpenoid | monoterp8 | - | 1297 | |
| Monoterpenoid | monoterp9 | - | 1305 | - |
| Monoterpenoid | monoterp10 | - | 1306 | - |
| Monoterpenoid | monoterp11 | - | 1308 | - |
| Monoterpenoid | monoterp12 | - | 1315 | - |
| Monoterpenoid | monoterp13 | - | 1371 | - |
| Monoterpenoid | monoterp14 | - | 1376 | - |
| Monoterpenoid | monoterp15 | - | 1399 | - |
| Monoterpenoid | monoterp16 | - | 1405 | - |
| Sesquiterpene | β-bisabolene | 495-61-4 | 1740 | 1727 |
| Sesquiterpene | β-caryophyllene | 87-44-5 | 1619 | 1604 |
| Sesquiterpene | (E)-β-farnesene | 18794-84-8 | 1668 | 1665 |
| Sesquiterpene | germacrene D | 23986-74-5 | 1744 | 1746 |
| Sesquiterpene | α-humulene | 6753-98-6 | 1699 | 1690 |
| Sesquiterpenoid | sesquiterp1 | - | 1493 | - |
| Sesquiterpenoid | sesquiterp2 | - | 1498 | - |
| Sesquiterpenoid | cyclosativene | 22469-52-9 | 1500 | 1490 |
| Sesquiterpenoid | α-copaene | 3856-25-5 | 1503 | 1497 |
| Sesquiterpenoid | ylangene | 14912-44-8 | 1523 | 1499 |
| Sesquiterpenoid | sesquiterp6 | - | 1533 | - |
| Sesquiterpenoid | sesquiterp7 ((Z)-α-bergamotene) | 18252-46-5 | 1547 | 1555 |
| Sesquiterpenoid | α-cedrene | 469-61-4 | 1552 | 1565 |
| Sesquiterpenoid | sesquiterp9 | - | 1561 | - |
| Sesquiterpenoid | sesquiterp10 | - | 1566 | - |
| Sesquiterpenoid | sesquiterp11 | - | 1588 | - |
| Sesquiterpenoid | α-santalene | 512-61-8 | 1591 | 1597 |
| Sesquiterpenoid | sesquiterp13 | - | 1594 | - |
| Sesquiterpenoid | sesquiterp14 | - | 1607 | - |
| Sesquiterpenoid | sesquiterp15 | - | 1648 | - |
| Sesquiterpenoid | (Z)-β-farnesene | 28973-97-9 | 1653 | 1652 |
| Sesquiterpenoid | α-himachalene | 3853-83-6 | 1657 | 1649 |
| Sesquiterpenoid | sesquiterp18 | - | 1658 | - |
| Sesquiterpenoid | sesquiterp19 | - | 1665 | - |
| Sesquiterpenoid | sesquiterp20 | - | 1678 | - |
| Sesquiterpenoid | γ-curcumene | 28976-68-3 | 1704 | 1695 |
| Sesquiterpenoid | sesquiterp22 | - | 1705 | - |
| Sesquiterpenoid | sesquiterp23 | - | 1717 | - |
| Sesquiterpenoid | β-curcumene | 28976-67-2 | 1753 | 1744 |
| Sesquiterpenoid | sesquiterp25 | - | 1768 | - |
| Sesquiterpenoid | α-curcumene | 644-30-4 | 1784 | 1773 |
| Sesquiterpenoid | sesquiterp27 | - | - | - |
| Sesquiterpenoid | (E,E)-4,8,12-trimethyltrideca-1,3,7,11-tetraene | 62235-06-7 | 1809 | - |
| Sesquiterpenoid | cadine-1,4-diene | 16728-99-7 | 1816 | 1802 |
| Sesquiterpenoid | sesquiterp30 | - | 1972 | - |
| Sesquiterpenoid | sesquiterp31 | - | 2020 | - |
| Sesquiterpenoid | sesquiterp32 (β-caryophyllene oxide) | 1139-30-6 | 2023 | 2013 |
| Sesquiterpenoid | sesquiterp33 | - | 2036 | - |
| Sesquiterpenoid | sesquiterp34 | - | 2075 | - |
| Sesquiterpenoid | sesquiterp35 | - | 2139 | - |
| Sesquiterpenoid | sesquiterp36 | - | 2175 | - |
| Sesquiterpenoid | sesquiterp37 | - | 2269 | - |
| Unknown | butyl acetate | 123-86-4 | 1054 | 1059 |
| Unknown | comp2 | - | 1114 | - |
| Unknown | comp3 | - | 1163 | - |
| Unknown | comp4 | - | 1183 | - |
| Unknown | butyl butanoate | 109-21-7 | 1213 | 1221 |
| Unknown | 5-hepten-2-one | 6714-00-7 | 1253 | 1249 |
| Unknown | 2-heptanol | 543-49-7 | 1316 | 1315 |
| Unknown | trimethyl-cyclohexanone | 2408-37-9 | 1333 | 1335 |
| Unknown | anisole | 100-66-3 | 1344 | 1340 |
| Unknown | comp10 | - | 1380 | - |
| Unknown | comp11 | - | 1393 | - |
| Unknown | comp12 | - | 1399 | - |
| Unknown | comp13 | - | 1414 | - |
| Uknown | comp14 | - | 1442 | - |
| Unknown | comp15 | - | 1450 | - |
| Unknown | comp16 | - | 1569 | - |