Table 1: Chemical composition of bergamot peel oil obtained from supercritical CO2 (55 °C and 350 bar) and compressed propane extraction (55 °C and 40 bar).
Components |
RIa |
RIb |
Area (%) |
CO2 |
propane |
α-Terpene |
931 |
932 |
0.17 |
0.09 |
α-Pinene |
939 |
938 |
0.83 |
0.54 |
Canfene |
953 |
953 |
0.05 |
- |
Sabinene |
976 |
975 |
1.64 |
1.11 |
β-Pinene |
980 |
982 |
6.27 |
4.08 |
Mircene |
991 |
993 |
0.36 |
0.95 |
p-Cimene |
1026 |
1026 |
0.18 |
0.46 |
Limonene |
1031 |
1030 |
45.13 |
21.53 |
γ-Terpinene |
1062 |
1062 |
3.25 |
6.08 |
Linalool |
1098 |
1096 |
11.35 |
15.16 |
α-Terpineol |
1189 |
1190 |
0.09 |
0.70 |
Neral |
1228 |
1225 |
1.37 |
1.12 |
Linalyl acetate |
1257 |
1255 |
23.67 |
19.74 |
Geranial |
1270 |
1269 |
0.25 |
2.03 |
Citronelil acetate |
1354 |
1351 |
- |
0.18 |
Neryl acetate |
1365 |
1362 |
1.34 |
0.57 |
β-Cariofilene |
1418 |
1417 |
0.84 |
1.96 |
Neryl acetate |
1434 |
1434 |
0.47 |
2.61 |
Trans-α-bergamotene |
1436 |
1439 |
0.08 |
1.17 |
Germacrene D |
1480 |
1480 |
0.15 |
0.90 |
β-Bisabolene |
1509 |
1511 |
1.27 |
3.04 |
α-Humulene |
1454 |
1457 |
- |
0.10 |
γ-Muurolene |
1477 |
1476 |
1.03 |
2.81 |
Carifilene oxide |
1581 |
1580 |
0.06 |
- |
Total identified (%) |
– |
99.85 |
86.93 |
aRetention indexes from literature (Adams, 1995).
bExperimental retention indexes (based on homologous series of n-alcanes C7-C30).