| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Glehnia littoralis | Rhizome | -- | -- | * | |
| Glehnia littoralis | Root | -- | -- | * | |
| Foeniculum vulgare | Seed | -- | -- | Rizk, A.F.M., The Phytochemistry of the Flora of Qatar, Scientific and Applied Research Centre, University of Qatar, Kingprint, Richmond, UK, 1986. | |
| Angelica dahurica | Root | -- | -- | * | |
| Ficus carica | Leaf | -- | -- | * | |
| Foeniculum vulgare | Fruit | -- | -- | * | |
| Angelica archangelica | Plant | -- | -- | Pakistan Encyclopedia Planta Medica. 1986. | |
| Balanites aegyptiacus | Bark | -- | -- | * | |
| Limonia acidissima | Bark | -- | 160.0 | Morton, J.F., Major Medicinal Plants. 1977. Atlas of Medicinal Plants of Middle America. Bahamas to Yucatan. 1981. | |
| Ammi majus | Seed | 400.0 | 3300.0 | * |