Table 3. Chemical composition of P. halepensis essential oils from West Northern of Algeria.
| Compounds | IRa LIT | IRb app | IRc pol | Collective Oild Simple Oilse |
Identification | ||
| % | %Min | %Max | |||||
| α-Thujene | 922 | 923 | 1021 | 0.7 | 0.4 | 1.0 | RI, MS |
| α-Pinene | 931 | 932 | 1023 | 16.8 | 12.2 | 24.5 | RI, MS |
| Camphene | 943 | 944 | 1066 | 0.2 | 0.1 | 0.3 | RI, MS |
| Sabinene | 964 | 966 | 1118 | 4.2 | 1.5 | 6.3 | RI, MS |
| β-Pinene | 970 | 971 | 1108 | 1.9 | 1.7 | 2.2 | RI, MS |
| Myrcene | 970 | 983 | 1159 | 25.2 | 15.2 | 32.0 | RI, MS |
| α-Phelandrene | 997 | 998 | 1157 | 0.1 | nd | 0.2 | RI, MS |
| 3-Carene | 1005 | 1006 | 1147 | 1.6 | 0.6 | 5.5 | RI, MS |
| α-Terpinene | 1008 | 1010 | 1175 | 0.9 | 0.1 | 1.8 | RI, MS |
| p-Cymene | 1010 | 1012 | 1259 | 0.6 | 0.2 | 1.8 | RI, MS |
| β-Phelandrene | 1021 | 1021 | 1204 | 0.4 | 0.7 | 1.4 | RI, MS |
| Limonene | 1020 | 1021 | 1195 | 0.9 | 0.6 | 1.4 | RI, MS |
| Z-β-Ocimene | 1024 | 1025 | 1225 | 0.4 | nd | 1.4 | RI, MS |
| E-β-ocimene | 1034 | 1036 | 1241 | 1.4 | 0.52 | 3.4 | RI, MS |
| γ-Terpinene | 1047 | 1049 | 1237 | 1.4 | 0.2 | 2.6 | RI, MS |
| Terpinolene | 1078 | 1082 | 1247 | 8.3 | 1.8 | 13.8 | RI, MS |
| Linalool | 1080 | 1084 | 1529 | 0.4 | 0.1 | 0.8 | RI, MS |
| Perillene | 1090 | 1099 | 1414 | 0.1 | tr | 0.1 | RI, MS |
| Cis-p-menth-2-en-1-ol | 1108 | 1107 | 1600 | 0.2 | 0.1 | 0.3 | RI, MS |
| Trans-p-menth-2-en-1-ol | 1113 | 1117 | 1612 | 0.1 | tr | 0.2 | RI, MS |
| Terpinene-4-ol | 1161 | 1164 | 1583 | 4.2 | 1.0 | 8.2 | RI, MS |
| α-Terpinolene | 1179 | 1175 | 1688 | 0.4 | tr | 0.7 | RI, MS |
| Bornyl acetate | 1269 | 1268 | 1475 | 0.1 | tr | 0.3 | RI, MS |
| Citronellyl acetate | 1331 | 1333 | 1645 | 0.1 | tr | 0.1 | RI, MS |
| Neryl acetate | 1342 | 1342 | 1409 | 0.1 | 0.1 | 0.2 | RI, MS |
| Geranyl acetate | 1361 | 1360 | 1740 | 0.2 | tr | 0.5 | RI, MS |
| α-Copaene | 1379 | 1373 | 1475 | 0.2 | 0.1 | 0.3 | RI, MS |
| E-β-Caryophyllene | 1424 | 1418 | 1583 | 10.9 | 7.0 | 17.1 | RI, MS |
| α-Humulene | 1456 | 1449 | 1651 | 2.1 | 1.3 | 3.4 | RI, MS |
| 2-Phenylethyl isovanerate | 1463 | 1468 | 1973 | 7.7 | 4.8 | 10.9 | RI, MS |
| Germacrene D | 1480 | 1474 | 1692 | 0.2 | 0.1 | 0.2 | RI, MS |
| α-muurolene | 1496 | 1492 | 1709 | 0.2 | tr | 0.6 | RI, MS |
| δ-Cadinene | 1516 | 1513 | 1738 | 0.3 | tr | 0.5 | RI, MS |
| E-α-Bisabolene | 1532 | 1532 | 1740 | 0.2 | 0.1 | 0.3 | RI, MS |
| Phenylethyl Tiglate E | 1547 | 1546 | 2141 | 0.1 | nd | 0.2 | RI, MS |
| Phenylethyl Tiglate Z | 1559 | 1568 | 2145 | 0.8 | tr | 3.3 | RI, MS |
| Caryophyllene oxide | 1576 | 1583 | 1898 | 0.8 | 0.2 | 2.2 | RI, MS |
| Guaiol | 1591 | 1592 | 2070 | 0.2 | 0.1 | 0.5 | RI, MS |
| Humulene epoxyde | 1601 | 1613 | 2035 | 0.1 | tr | 0.1 | RI, MS |
| Epi-Cubenol | 1624 | 1625 | 2043 | 0.1 | 0.1 | 0.2 | RI, MS |
| Tau-Cadinol | 1632 | 1633 | 2163 | 0.2 | tr | 0.1 | RI, MS |
| T-Muurolol | 1634 | 1638 | 2141 | 0.1 | 0.1 | 0.3 | RI, MS |
| α-Cadinol | 1645 | 1640 | 2163 | 0.2 | tr | 0.3 | RI, MS |
| Bulnesol | 1659 | 1666 | 2195 | 0.1 | nd | 0.1 | RI, MS |
| Cembrene | 1938 | 1940 | 2185 | 0.4 | 0.1 | 1.6 | RI, MS, Ref. |
| m-Camphorene | 1947 | 1939 | 2234 | 0.2 | nd | 0.4 | RI, MS, Ref. |
| Cembrene A | 1962 | 1951 | 2227 | 0.1 | nd | 0.3 | RI, MS, Ref. |
| p-Camphorene | 1980 | 1974 | 1987 | 0.3 | nd | 1.1 | RI, MS, Ref. |
| Geranyl Linalool | 2037 | 2037 | 2540 | 1.5 | nd | 3.0 | RI, MS |
| Total Identification % | 97.9 | ||||||
| Yields % (w/w) | 0.26 | 0.10 | 0.63 | ||||
| Hydrocarbon compounds | 80.6 | ||||||
| Monoterpene hydrocarbons | 65.5 | ||||||
| Sesquiterpene hydrocarbons | 14.1 | ||||||
| diterpenic hydrocarbons | 1.0 | ||||||
| Oxygenated compounds | 17.3 | ||||||
| Oxygenated monoterpenes | 5.4 | ||||||
| Oxygenated sesquiterpenes | 1.8 | ||||||
| Oxygenated diterpenes | 1.5 | ||||||
| Non-terpenic oxygenated compounds | 8.6 | ||||||
a: Retention indices of literature on the apolar column (/RILit) reported from König et al., 2001; b: Retention indices on the apolar Rtx-1 column; c: Retention indices on the polar Rtx-Wax column; d: Normalized percentages abundance are given on the apolar column except for components with identical RI (percentages are given on the polar column), tr=trace (<0.05%). e: Minimum and maximum normalized percentages abundance from simple oils; RI: Retention indices; MS: Mass spectra in electronic impact mode; Ref.: compounds identified from literature data: König et al., 2001).