| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Malus domestica | Fruit | 8.0 | 27.0 | * | |
| Capsicum annuum | Leaf | -- | -- | * | |
| Portulaca oleracea | Leaf | -- | -- | * | |
| Lycopersicon esculentum | Leaf | -- | -- | * | |
| Carica papaya | Leaf | -- | -- | Jim Duke's personal files. | |
| Carica papaya | Pericarp | -- | -- | Jim Duke's personal files. | |
| Carica papaya | Fruit | -- | -- | Jim Duke's personal files. | |
| Daucus carota | Tissue Culture | -- | -- | * | |
| Spinacia oleracea | Leaf | -- | -- | * | |
| Capsicum annuum | Fruit | -- | -- | * | |
| Ficus carica | Fruit | -- | -- | Blaschek, W., Hansel, R., Keller, K., Reichling, J., Rimpler, H., and Schneider, G. eds. 1998. Hager's Handbuch der Pharmazeutischen Praxis, Auflage Band 2 (A-K), 909 pp., (L-Z), 858 pp. Springer-Verlag, Berlin. | |
| Panax ginseng | Root | -- | -- | * | |
| Cucumis sativus | Seed | -- | -- | * |