Table 1.
Identified bioactive compounds of analyzed essential oils, % ± SD.
| Compound | Retention Indices | Retention Indices NIST 1 | Retention Time | Tea Tree | Rosemary | Eucalyptus | Lavender |
|---|---|---|---|---|---|---|---|
| α-Thujene | 922 | 924 | 5.636 | 1.10 ± 0.01 | 0.03 ± 0.00 | 0.06 ± 0.00 | 0.05 ± 0.01 |
| α-Pinene | 930 | 932 | 5.862 | 18.38 ± 0.08 | 8.38 ± 0.02 | 12.60 ± 0.01 | 0.72 ± 0.00 |
| Camphene | 945 | 946 | 6.241 | 0.08 ± 0.00 | 0.03 ± 0.00 | 0.10 ± 0.00 | 0.25 ± 0.01 |
| Thuja-2,4(10)-diene | 950 | 952 | 6.378 | 0.01 ± 0.00 | |||
| Sabinene | 970 | 969 | 6.932 | 0.35 ± 0.01 | 0.12 ± 0.00 | ||
| β-Pinene | 974 | 974 | 7.047 | 3.19 ± 0.01 | 0.38 ± 0.01 | 0.84 ± 0.01 | 0.60 ± 0.02 |
| Myrcene | 988 | 988 | 7.428 | 0.45 ± 0.00 | 0.49 ± 0.00 | 0.58 ± 0.01 | 0.56 ± 0.01 |
| Carbitol | 1003 | 1001 | 7.863 | 13.05 ± 0.04 | |||
| α-Phellandrene | 1004 | 1002 | 7.9 | 0.09 ± 0.00 | 0.68 ± 0.00 | 0.94 ± 0.00 | |
| Δ3-Carene | 1009 | 1008 | 8.098 | 0.09 ± 0.00 | 1.45 ± 0.03 | 0.05 ± 0.01 | |
| Hexyl acetate | 1011 | 1009 | 8.146 | 0.13 ± 0.01 | |||
| 1,4-Cineole | 1013 | 1012 | 8.235 | ||||
| α-Terpinene | 1015 | 1014 | 8.311 | 2.35 ± 0.01 | 2.02 ± 0.01 | 0.15 ± 0.00 | 0.41 ± 0.00 |
| p-Cymene | 1023 | 1020 | 8.598 | 4.30 ± 0.01 | 4.30 ± 0.05 | 3.24 ± 0.00 | 0.87 ± 0.01 |
| Limonene | 1027 | 1024 | 8.758 | 7.55 ± 0.01 | 11.86 ± 0.01 | 3.87 ± 0.01 | 2.23 ± 0.02 |
| 1,8-Cineole | 1033 | 1026 | 8.864 | 2.15 ± 0.05 | 64.02 ± 0.04 | 64.71 ± 0.04 | 5.55 ± 0.01 |
| (Z)-β-ocimene | 1035 | 1032 | 9.035 | 0.28 ± 0.00 | 0.06 ± 0.00 | ||
| β-(E)-Ocimene | 1046 | 1046 | 9.45 | 0.08 ± 0.00 | 0.11 ± 0.00 | 0.02 ± 0.00 | |
| γ-Terpinene | 1058 | 1054 | 9.89 | 14.01 ± 0.01 | 4.06 ± 0.00 | 7.37 ± 0.00 | 0.05 ± 0.00 |
| p-Mentha-2,4(8)-diene | 1085 | 1083 | 10.891 | 0.38 ± 0.01 | |||
| Terpinolene | 1088 | 1086 | 10.991 | 3.56 ± 0.02 | 0.31 ± 0.00 | 0.35 ± 0.00 | 0.04 ± 0.00 |
| Linalool | 1099 | 1095 | 11.423 | 0.05 ± 0.00 | 0.10 ± 0.00 | 10.71 ± 0.02 | |
| trans-Sabinol | 1137 | 1137 | 13.036 | 0.06 ± 0.00 | 0.14 ± 0.00 | ||
| Camphor | 1143 | 1141 | 13.267 | 0.12 ± 0.00 | 3.72 ± 0.03 | ||
| Isoborneol | 1154 | 1155 | 13.787 | 1.04 ± 0.02 | |||
| Borneol | 1164 | 1165 | 14.24 | 0.14 ± 0.00 | 0.46 ± 0.01 | ||
| Isononyl acetate | 1171 | 1171 | 14.53 | 3.45 ± 0.01 | |||
| Terpinen-4-ol | 1180 | 1174 | 14.944 | 38.53 ± 0.04 | 0.95 ± 0.00 | 0.90 ± 0.02 | |
| α-Terpineol | 1190 | 1186 | 15.34 | 2.16 ± 0.03 | 2.50 ± 0.01 | 2.00 ± 0.00 | |
| γ-Terpineol | 1196 | 1199 | 15.606 | 0.21 ± 0.00 | |||
| Citronellol | 1226 | 1223 | 16.923 | 2.50 ± 0.00 | |||
| Geraniol | 1254 | 1249 | 18.11 | 1.28 ± 0.00 | |||
| Linalool acetate | 1255 | 1254 | 18.194 | 9.60 ± 0.02 | |||
| Bornyl acetate | 1285 | 1287 | 19.562 | 0.21 ± 0.00 | |||
| α-terpinyl acetate | 1349 | 1346 | 22.374 | 10.93 ± 0.06 | |||
| Neryl acetate | 1364 | 1359 | 23.038 | 0.44 ± 0.00 | |||
| Geranyl acetate | 1384 | 1379 | 23.898 | 0.80 ± 0.02 | |||
| α-Gurjunene | 1409 | 1409 | 25.023 | 0.12 ± 0.00 | |||
| (E)-Caryophyllene | 1420 | 1417 | 25.443 | 0.38 ± 0.01 | 1.80 ± 0.00 | ||
| Aromadendrene | 1439 | 1439 | 26.282 | 0.69 ± 0.01 | |||
| 9-epi-Caryophyllene | 1462 | 1464 | 27.225 | 0.17 ± 0.00 | |||
| Viridiflorene | 1497 | 1496 | 28.693 | 0.07 ± 0.00 | |||
| Total peak area | 564,685,150 | 117,582,225 | 142,637,552 | 98,030,240 | |||
| Total of identified compounds (%) | 99.76 | 98.12 | 99.91 | 74.53 |
1—Retention indices based on n-alkane series under identical experimental conditions and comparison was performed with the mass spectra library search NIST [33]; SD—standard deviation calculated for n (n = 3) GC–MSD analysis.