Table 1: Comparative leaf and rhizome essential oil composition of two Alpinia spp.

S.No. Compounds RIa RIb Alpinia calcarata Alpinia zerumbet
LO RO LO RO
1 α-Thujene 932 931 0.15 0.1 t 0.77
2 α-Pinene 941 939 7.73 3.42 5.96 3.22
3 Camphene 954 953 6.49 4.97 t 5.38
4 β-Pinene 982 980 23.52 5.02 14.81 8.83
5 Myrcene 994 991 0.92 0.95 0.49 3.49
6 α-Phellandrene 1009 1005 t 0.17 t 1.17
7 α-Terpinene 1019 1018 t - t t
8 p-Cymene 1029 1026 t 0.1 t 1.48
9 Limonene 1034 1031 0.24 0.14 t 0.48
10 1,8-Cineole 1038 1033 36.07 43.63 26.51 15.61
11 (Z)-β-Ocimene 1042 1040 0.28 0.16 11.86 2.84
12 (E)-β-Ocimene 1054 1050 0.27 0.37 2.19 1.17
13 γ-Terpinene 1065 1062 t t t t
14 cis-Sabinene hydrate 1069 1068 t t 1.27 t
15 Linalool 1101 1098 t 0.33 2.26 1.65
16 Camphor 1145 1143 11.6 4.31 1.94 3.21
17 Borneol 1167 1165 0.45 1.78 - 0.13
18 Terpinen-4-ol 1180 1177 1.64 1 20.87 6.42
19 α-Terpineol 1192 1189 t 4.61 2.08 1.06
20 endo-fenchyl acetate 1220 1220 - 13.12 - 24.39
21 exo-Fenchyl acetate 1232 1234 - 0.1 t 0.16
22 Bornyl acetate 1285 1285 0.7 0.52 0.32 5.61
23 (E)-Methyl cinnamate 1381 1379 1.03 1.54 t 0.22
24 β-Caryophyllene 1418 1418 0.23 0.1 1.51 0.1
25 (Z)-β-Farnesene 1445 1443 0.1 0.27 t 0.17
26 α-Humulene 1457 1454 0.2 0.13 t t
27 (E)-β-Farnesene 1459 1458 0.11 0.17 t t
28 Germacrene D 1481 1480 0.16 0.15 0.1 0.18
29 Caryophyllene oxide 1584 1581 0.13 t 1.35 0.19
30 Viridiflorol 1592 1590 1.92 3.36 t 0.28
31 Bulnesol 1672 1666 0.38 1.58 0.31 1.05
32 Monoterpene hydrocarbon - - 39.6 15.4 35.31 28.83
33 Oxygenated monoterpene - - 51.49 70.94 55.25 58.46
34 Sesquiterpene hydrocarbon - - 0.8 0.82 1.61 0.45
35 Oxygenated Sesquiterpene - - 2.43 4.94 1.66 1.52
36 Total identified - - 94.32 92.1 93.83 89.26
37 Essential oil yield (v/w fresh weight basis %) - - 0.3 0.5 0.2 0.4

RIa: Retention Index determined with reference to homologous series of n-alkane (C8–C24) on TG-5 capillary column; RIb: Retention index literature [23]; t = trace (<0.1%); (-): Absent.