Review Article
Acorn Oil: Chemistry and Functionality
Table 2
Chemical characteristics of oil extracted from acorn species.
| | Acorn species | Origin | Oil (%) | SV (mg KOH/g) | IV (g/100 g) | FFA (%) | PV (meq O2 kg−1) | AV (mg/g) | Specific gravity | RI | References |
| | Q. ilex | Algeria | — | — | 103.68 | 0.97 | 1.50 | — | — | 1.453 | [21] | | Q. suber | — | — | 125.28 | 1.13 | 0.83 | — | — | 1.453 | | Q. coccifera | — | — | 129.60 | 0.92 | 1.00 | — | — | 1.449 |
| | Q. ilex | Algeria | 9.0 | 166.7 | 85.8 | — | — | 5.3 | — | — | [12] | | Q. suber | 9.0 | 160.3 | 78.6 | — | — | 5.1 | — | — |
| | Q. aegilops | Jordan | 7.51 | 204.2 | 87.6 | — | — | — | 0.912 | 1.4645 | [2] | | Q. infectoria | 6.57 | 219.4 | 76.7 | — | — | — | 0.922 | 1.4595 | | Q. calliprinos | 3.40 | 192.6 | 75.2 | — | — | — | 0.918 | 1.4529 | | Q. castaneifolia | | 193 | 112.7 | | | | 0.9182 | 1.4738 |
| | — | Turkey | — | — | 99.63 | — | 0.20 | 1.83 | 0.83 | 1.470 | [14] |
| | Q. rotundifolia | Portugal | — | | 81 | | 5 | 1.1 | 0.895 | 1.4629 | [25] | | Q. suber | — | | 81 | | 6 | 1.3 | 0.888 | 1.4669 |
| | Q. robura | Serbia | 5.6 | 158.6 | 89.3 | — | — | — | 0.9024 | 1.4669 | [16] | | Q. cerrisa | 4.8 | 186.5 | 91.2 | — | — | — | 0.9018 | 1.4605 |
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SV, saponification value; IV, iodine value; FFA, free fatty acid; AV, acid value; PV, peroxide; RI, refractive index; not detected. aMax value.
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