| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Piper nigrum | Fruit | -- | 0.054 | -1.1 | Charalambous, G. (Ed.). 1994. Spices, Herbs and Edible Fungi. Elsevier Science B. V. Amsterdam. 764 pp. |
| Pistacia vera | Seed | 52.0 | 54.0 | -0.6 | * |
| Populus nigra | Inflorescence | -- | -- | * | |
| Prunus dulcis | Seed | 150.0 | 275.0 | 0.1 | * |
| Prunus domestica | Fruit | 8.0 | 62.0 | -0.2 | * |
| Prunus persica | Fruit | 10.0 | 86.0 | 0.2 | * |
| Prunus cerasus | Fruit | 1.3 | 9.4 | -1.0 | * |
| Psoralea corylifolia | Seed | -- | -- | * | |
| Pyrus communis | Fruit | 0.6 | 31.0 | -0.6 | * |
| Rheum rhabarbarum | Leaf | 1197.0 | 1238.0 | 3.1 | * |
| Rheum rhabarbarum | Pt | 2.0 | 48.0 | -1.0 | * |
| Ribes rubrum | Fruit | 8.0 | 59.0 | -0.2 | * |
| Ribes nigrum | Fruit | 22.0 | 120.0 | 0.7 | * |
| Ricinus communis | Oil | -- | 9.0 | -0.7 | * |
| Rosa canina | Fruit | 41.0 | 204.0 | 2.0 | * |
| Rosmarinus officinalis | Leaf | -- | -- | * | |
| Rubus idaeus | Fruit | 9.0 | 56.0 | -0.3 | * |
| Sesamum indicum | Seed Oil | -- | -- | * | |
| Sesamum indicum | Seed | 22.0 | 24.0 | -0.7 | USDA's Ag Handbook 8 and sequelae) |
| Solanum tuberosum | Tuber | 0.5 | 2.8 | USDA's Ag Handbook 8 and sequelae) |