Table 1.
Chemical composition (%) of the essential oils extracted from crude organic propolis and from its moist and dry residues.
| Compound | RIcalc | RIlit | EOP | EOMR | EODR |
|---|---|---|---|---|---|
| % | |||||
| Hexanal | 801 | 801 | 0.19 | - | - |
| Tricyclene | 922 | 926 | 1.54 | - | - |
| α-Thujene | 931 | 930 | 1.01 | 0.97 | 1.13 |
| α-Pinene | 938 | 939 | 66.48 | 42.17 | 16.25 |
| Camphene | 952 | 954 | 2.94 | - | 0.55 |
| Thuja-2,4(10)-diene | 958 | 960 | 2.04 | 5.02 | 4.67 |
| Sabinene | 977 | 975 | 0.45 | - | 0.50 |
| β-Pinene | 981 | 979 | 18.46 | 10.29 | 5.15 |
| Myrcene | 995 | 990 | 0.67 | 1.32 | - |
| n-Octanal | 1005 | 998 | - | 0.6 | 0.35 |
| α-Terpinene | 1020 | 1017 | 0.22 | 0.67 | 0.91 |
| p-Cymene | 1027 | 1024 | 0.81 | 2.29 | 2.07 |
| Limonene | 1032 | 1029 | 2.04 | 2.72 | 3.07 |
| γ-Terpinene | 1062 | 1059 | 0.26 | 0.71 | 0.99 |
| Acetophenone | 1068 | 1065 | 0.35 | 0.68 | 0.64 |
| n-Nonanal | 1105 | 1100 | - | 0.62 | 0.97 |
| Ethyl benzoate | 1172 | 1173 | - | 4.74 | 7.80 |
| n-Decanal | 1206 | 1201 | - | 0.52 | 1.32 |
| α-Copaene | 1377 | 1376 | - | 0.93 | - |
| Ethyl decanoate | 1395 | 1395 | - | - | 0.74 |
| (E)-Caryophyllene | 1426 | 1419 | - | 1.18 | 3.02 |
| Zonarene | 1529 | 1529 | - | - | 3.82 |
| Total | 97.46 | 75.43 | 53.95 | ||
RIcalc: Retention index calculated; RIlit: Retention index from the literature; EOP: essential oil of propolis; EOMR: essential oil from the moist residue of propolis; EODR: essential oil from the dry residue of propolis. The column used was RTX5MS (RESTREK).