Table 2.
Comparison of the main components of essential oil from different sunflower parts (receptacle, capitula and pollen).
| Compound | Receptacle | Capitula a [9] | Pollen b [10] | |||
|---|---|---|---|---|---|---|
| RI c | Content (%) | RI | Content (%) | RI | Content (%) | |
| α-Pinene | 930 | 26.00 | 940 | 74.50 | 941 | 20.57 |
| Verbenone | 1198 | 7.40 | 1206 | 0.2 | 1205 | 1.52 |
| Calarene | 1412 | 5.27 | - | - | - | - |
| Dehydro-cyclolongifolene oxide | 1556 | 4.81 | - | - | - | - |
| d-Verbenol | 1149 | 4.11 | - | - | - | - |
| Abietic acid | 2125 | 3.78 | - | - | - | - |
| Kaur-16-ene | 2037 | 3.51 | - | - | - | - |
| Pimaric acid | 2101 | 3.09 | - | - | - | - |
| 3,3,5,6,7-Pentamethyl-1-Indanone | 1505 | 2.96 | - | - | - | - |
| Hexadecanoic acid | 1775 | 2.26 | - | - | - | - |
| cis-Carveol | 1207 | 2.20 | - | - | - | - |
| Phellopterin | 1773 | 2.17 | - | - | - | - |
| Terpinolene | 1124 | 1.69 | 1089 | 0.2 | - | - |
| 16-Kaur-16-ol | 2040 | 1.65 | - | - | - | - |
| α-Terpineol | 1172 | 1.27 | 1020 | 0.4 | - | - |
| trans-p-Mentha-2,8-dienol | 1111 | 1.30 | 1126 | 0.05 | - | - |
| Pinocarvone | 1157 | 1.14 | 1164 | 0.1 | - | - |
| Linoleic acid | 2008 | 1.00 | - | - | - | - |
| Kauran-16-ol | 2045 | 0.99 | - | - | - | - |
| cis-Verbenol | 1146 | 0.82 | 1143 | 0.7 | - | - |
a The essential oil of sunflower capitula was extracted by water distillation in a Clevenger-type apparatus, and the components were identified by GC-MS. b The volatile components of sunflower pollen were identified by headspace solid-phase microextraction (HS-SPME)/GC-MS technique. c Retention indices. -, not detected with the same compounds and retention indices.