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).