| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Apium graveolens | Pt | -- | 2.6 | * | |
| Apium graveolens | Stem | -- | 0.4 | * | |
| Capsicum annuum | Fruit | -- | 1.4 | * | |
| Daucus carota | Plant | -- | -- | * | |
| Hordeum vulgare | Seed | -- | 0.9 | * | |
| Humulus lupulus | Inflorescence | -- | 1.0 | * | |
| Humulus lupulus | Flower | -- | 1.0 | * | |
| Malus domestica | Pericarp | -- | 1.5 | * | |
| Malus domestica | Fruit Epidermis | -- | 1.5 | * | |
| Nicotiana tabacum | Leaf | -- | -- | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. | |
| Papaver somniferum | Latex Exudate | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Piper nigrum | Seed | -- | -- | * | |
| Spinacia oleracea | Leaf | -- | 2.5 | * | |
| Vitis vinifera | Fruit Juice | -- | -- | * | |
| Zea mays | Seed | -- | -- | * |