| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Zanthoxylum americanum | Fruit | 3.0 | 12.5 | 1.4 | * |
| Angelica archangelica | Seed | 12.0 | 75.0 | 1.0 | Wealth of India. |
| Petroselinum crispum | Fruit | -- | 6.0 | -0.4 | * |
| Angelica archangelica | Fruit | -- | 4.0 | -1.0 | * |
| Murraya koenigii | Seed | -- | 21.0 | -1.0 | * |
| Apium graveolens | Seed | -- | -- | * | |
| Petroselinum crispum | Leaf | -- | -- | * | |
| Angelica archangelica | Shoot | -- | -- | * | |
| Angelica dahurica | Root | -- | -- | * | |
| Petroselinum crispum | Root | -- | 500.0 | * | |
| Citrus limon | Fruit Essent. Oil | -- | -- | Jim Duke's personal files. | |
| Pastinaca sativa | Seed | -- | -- | * | |
| Citrus limon | Essential Oil | -- | -- | * | |
| Skimmia japonica | Leaf | -- | 3000.0 | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Ammi majus | Seed | -- | -- | * | |
| Peucedanum ostruthium | Root | -- | -- | * | |
| Citrus aurantiifolia | Fruit | -- | -- | * | |
| Angelica archangelica | Root | -- | -- | * | |
| Angelica archangelica | Plant | -- | -- | * |