| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Myristica fragrans | Seed Essent. Oil | 50000.0 | 77000.0 | -0.2 | * |
| Elettaria cardamomum | Seed Essent. Oil | 44000.0 | 448400.0 | 2.1 | * |
| Eucalyptus globulus | Leaf Essent. Oil | 29000.0 | 58000.0 | 0.3 | * |
| Melaleuca alternifolia | Essential Oil | 25000.0 | 31000.0 | 0.6 | * |
| Elettaria cardamomum | Fruit Essent. Oil | 17000.0 | 28000.0 | 0.3 | * |
| Valeriana officinalis | Leaf Essent. Oil | 9500.0 | 75400.0 | 0.7 | * |
| Ocimum basilicum | Essential Oil | 6700.0 | 23900.0 | 0.3 | * |
| Pinus sylvestris | Leaf Essent. Oil | 6500.0 | 167000.0 | 2.5 | * |
| Myristica fragrans | Essential Oil | 6000.0 | 14000.0 | -0.2 | * |
| Ocimum basilicum | Leaf Essent. Oil | 5650.0 | 7000.0 | -0.7 | * |
| Apium graveolens | Seed Essent. Oil | 5000.0 | 14000.0 | -0.7 | * |
| Origanum vulgare | Shoot Essent. Oil | 4200.0 | 8500.0 | -0.5 | * |
| Citrus limon | Pericarp Essent. Oil | 4000.0 | 73000.0 | Jim Duke's personal files. | |
| Citrus limon | Leaf Essent. Oil | 4000.0 | 125000.0 | 1.7 | Jim Duke's personal files. |
| Laurus nobilis | Leaf Essent. Oil | 4000.0 | 92700.0 | 1.0 | * |
| Apium graveolens | Fruit Essent. Oil | 3000.0 | 14000.0 | -0.3 | * |
| Eucalyptus citriodora | Leaf Essent. Oil | 3000.0 | 4000.0 | -0.8 | * |
| Bursera delpechiana | Wood | 2125.0 | 10200.0 | * | |
| Pycnanthemum loomisii | Shoot | 1452.0 | 1932.0 | 1.7 | Lawrence, B.M., Essential Oils 1976-1977, Essential Oils 1978, Essential Oils 1979-1980. |
| Satureja obovata | Shoot | 775.0 | 1425.0 | 1.2 | Fitoterapia No.60: 277. |