Table 2.
Volatiles compositions of RC, GRC and ginger juice.
| Peak Number | RT | RIa | RIb | Identified Compounds | RC | GRC | Ginger Juice |
|---|---|---|---|---|---|---|---|
| 1 | 4.28 | 800 | 800 [39] | Hexanal | - | - | 0.19% |
| 2 | 7.09 | 924 | 925 [40] | Tricyclene | - | - | 0.05% |
| 3 | 7.45 | 935 | 939 [39] | α-Pinene | - | - | 2.91% |
| 4 | 8.00 | 952 | 953 [39] | Camphene | - | - | 14.85% |
| 5 | 9.24 | 989 | 980 [39] | β-Pinene | - | - | 2.32% |
| 6 | 9.64 | 1001 | 1003 [39] | α-Phellandrene | - | - | 1.23% |
| 7 | 10.38 | 1025 | 1018 [39] | β-Phellandrene | - | - | 12.89% |
| 8 | 12.04 | 1079 | 1088 [39] | p-Mentha-1,4(8)-diene | - | - | 0.32% |
| 9 | 12.61 | 1097 | 1098 [39] | β-Linalool | - | - | 0.91% |
| 10 | 13.35 | 1122 | 1126 [41] | cis-p-Menth-2-en-1-ol | - | - | 0.15% |
| 11 | 14.09 | 1148 | 1148 [40] | Citronellal | - | - | 0.86% |
| 12 | 14.42 | 1159 | 1138 [42] | cis-Verbenol | - | - | 0.07% |
| 13 | 14.68 | 1168 | 1165 [39] | endo-Borneol | - | - | 3.75% |
| 14 | 14.92 | 1177 | 1183 [40] | Terpinen-4-ol | - | - | 0.89% |
| 15 | 15.40 | 1193 | 1189 [39] | α-Terpineol | - | - | 1.39% |
| 16 | 16.70 | 1241 | 1228 [40] | Neral | - | - | 8.87% |
| 17 | 17.55 | 1272 | 1270 [39] | Geranial | - | - | 10.31% |
| 18 | 18.01 | 1289 | 1291 [40] | 2-Undecanone | - | - | 0.30% |
| 19 | 19.06 | 1328 | 1337 [43] | δ-Elemene | - | - | 0.06% |
| 20 | 19.97 | 1362 | 1374 [40] | Cyclosativene | - | - | 0.10% |
| 21 | 20.23 | 1371 | 1377 [39] | α-Copaene | - | - | 0.16% |
| 22 | 20.52 | 1382 | 1391 [39] | β-Elemene | - | 0.34% | 0.30% |
| 23 | 21.29 | 1413 | 1418 [39] | Caryophyllene | - | - | 0.04% |
| 24 | 21.52 | 1424 | 1433 [43] | γ-Elemene | - | 0.16% | 0.22% |
| 25 | 22.15 | 1452 | 1458 [39] | β-Farnesene | - | - | 0.21% |
| 26 | 22.83 | 1483 | 1486 [40] | α-Curcumene | - | 4.27% | 4.32% |
| 27 | 23.22 | 1501 | 1502 [40] | Zingiberene | - | 15.73% | 8.40% |
| 28 | 23.41 | 1507 | 1509 [39] | α-Farnesene | - | 4.03% | 3.40% |
| 29 | 23.49 | 1510 | 1509 [39] | β-Bisabolene | - | 4.95% | 2.59% |
| 30 | 23.71 | 1518 | 1513 [39] | γ-Cadinene | - | 0.73% | - |
| 31 | 23.90 | 1525 | 1532 [40] | β-Sesquiphellandrene | - | 9.28% | 5.36% |
| 32 | 24.57 | 1548 | 1549 [43] | Elemol | - | 0.94% | 1.18% |
| 33 | 24.83 | 1557 | 1564 [39] | Nerolidol | - | 2.99% | 0.85% |
| 34 | 25.65 | 1586 | 1543 [44] | cis-Sesquisabinene hydrate | - | - | 0.56% |
| 35 | 25.86 | 1593 | 1586 [44] | trans-Sesquisabinene hydrate | - | - | 0.07% |
| 36 | 26.30 | 1609 | 1621 [41] | γ-Eudesmol | - | 2.52% | 0.19% |
| 37 | 26.51 | 1616 | 1613 [45] | Isoaromadendrene epoxide | - | - | 1.87% |
| 38 | 27.06 | 1655 | 1649 [39] | Eudesm-4(14)-en-11-ol | - | 4.93% | 2.45% |
| 39 | 27.37 | 1673 | 1681 [41] | β-Bisabolol | - | 1.01% | - |
| 40 | 28.44 | 1724 | 1715 [46] | Pentadecanal | 0.14% | - | - |
| 41 | 29.80 | 1782 | 1763 [47] | Tetradecanoic acid | 3.17% | 1.01% | - |
| 42 | 32.59 | 1921 | 1926 [47] | Hexadecanoic acid, methyl ester | 0.54% | 0.23% | - |
| 43 | 33.23 | 1947 | 1946 [48] | Geranyl-p-cymene | - | - | 0.05% |
| 44 | 33.56 | 1960 | 1951 [49] | Palmitoleic acid | 1.31% | 1.24% | - |
| 45 | 34.25 | 1987 | 1983 [47] | n-Hexadecanoic acid | 34.00% | 19.54% | |
| 46 | 35.48 | 2069 | - | cis-10-Heptadecenoic acid | 0.75% | - | - |
| 47 | 35.75 | 2090 | 2094 [47] | Linoleic acid, methyl ester | 2.02% | 0.69% | - |
| 48 | 37.21 | 2173 | 2159 [47] | cis-9,cis-12-Octadecadienoic acid | 40.80% | 11.70% | - |
| Total | 82.73% | 86.29% | 94.64% |
RIa: Retention index calculated from retention times relative to that of n-alkanes (C6–C26) on the the DB-5 column. RIb: literature retention index. RC: Rhizoma coptidis, GRC: ginger juice-processed Rhizoma coptidis. “-” means not detected or not available.