| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Artemisia vulgaris | Plant | -- | -- | Chem. & Pharm. Bull. 38: 2205. | |
| Curcuma longa | Rhizome | -- | 3.8 | -1.0 | * |
| Glechoma hederacea | Plant | -- | -- | Chem. & Pharm. Bull. 38: 2205. | |
| Inula helenium | Plant | -- | -- | * | |
| Carya illinoensis | Seed | -- | 1.6 | -0.6 | * |
| Vigna mungo | Seed | -- | 5.664 | 0.2 | * |
| Foeniculum vulgare | Fruit | -- | 1.0 | -0.5 | * |
| Cocos nucifera | Seed | -- | 2.1 | -0.5 | Furr, A.K., et al. 1979 |
| Ribes nigrum | Fruit | -- | 0.101 | -0.7 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Simmondsia chinensis | Seed | -- | 4.0 | -0.1 | * |