| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Helianthus annuus | Seed | -- | -- | * | |
| Hordeum vulgare | Sprout Seedling | -- | -- | * | |
| Lycopersicon esculentum | Fruit | -- | -- | * | |
| Nicotiana tabacum | Leaf | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Pisum sativum | Seed | -- | -- | * | |
| Solanum tuberosum | Tuber | -- | -- | * | |
| Triticum aestivum | Seed | -- | -- | * | |
| Zea mays | Flower | -- | -- | * |