Table 1. GC-MS analysis of frankincense oil extracted by hydro-distillation (HD) and microwave assisted hydro-distillation (MAHD) methods.
| Retention Index | Compound | Class | Relative % | ||
|---|---|---|---|---|---|
| RI a | RI L | HD | MAHD | ||
| 926 | 924 | α-Thujene | Mh | 0.38 | 0.17 |
| 937 | 932 | α-Pinene | Mh | 2.89 | 3.47 |
| 955 | 946 | Camphene | Mh | 0.18 | - |
| 975 | 969 | Sabinene | Mh | 0.78 | - |
| 982 | 974 | β-Pinene | Mh | 0.26 | 0.18 |
| 988 | 988 | Myrcene | Mh | 0.94 | 0.16 |
| 1012 | 1008 | δ-3-Carene | Mh | 0.59 | - |
| 1035 | 1024 | Limonene | Mh | 2.62 | 2.95 |
| 1033 | 1026 | 1,8-Cineole | Om | - | 0.15 |
| 1038 | 1032 | cis-β-Ocimene | Mh | 4.23 | - |
| 1049 | 1044 | trans-β-Ocimene | Mh | 2.77 | 0.64 |
| 1064 | 1059 | γ-Terpinene | Mh | 0.11 | - |
| 1072 | 1063 | n-Octanol | Aa | 1.27 | 2.27 |
| 1100 | 1095 | Linalool | Om | 1.75 | 1.03 |
| 1151 | 1135 | trans-Pinocarveol | Om | - | 0.31 |
| 1154 | 1137 | cis-Verbenol | Om | - | 0.62 |
| 1213 | 1211 | n-Octyl acetate | Ae | 75.92 | 80.45 |
| 1297 | 1284 | Bornyl acetate | Om | 0.25 | 0.24 |
| 1365 | 1350 | Citronellyl acetate | Om | 0.09 | 0.17 |
| 1400 | 1379 | Geranyl acetate | Om | 0.47 | - |
| 1976 | 1959 | Cembrene A | Dh | - | 0.99 |
| 2015 | 2002 | Cembrene C | Dh | - | 0.51 |
| 2031 | 2004 | Verticilla-4(20),7,11 triene | Dh | 0.36 | 1.79 |
| 2175 | 2150 | Incensole | Od | - | 0.78 |
| 2197 | 2189 | Incensole acetate | Od | 0.35 | 1.7 |
| Monoterpene hydrocarbons | Mh | 15.75 | 7.57 | ||
| Diterpene hydrocarbons | Dh | 0.36 | 3.29 | ||
| Total Hydrocarbons | TH | 16.11 | 10.86 | ||
| Aliphatic alcohols and esters | Aa, Ae | 77.19 | 82.72 | ||
| Oxygenated monoterpenes | Om | 2.56 | 2.52 | ||
| Oxygenated diterpenes | Od | 0.35 | 2.48 | ||
| Total Oxygenated Compounds | TO | 80.1 | 87.72 | ||
| Total Identified compounds | TI | 96.21 | 98.58 | ||