| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Apium graveolens | Essential Oil | -- | -- | * | |
| Avena sativa | Seed | -- | -- | * | |
| Brassica oleracea var. italica | Plant | -- | -- | Jim Duke's personal files. | |
| Brassica oleracea var. botrytis l. | Plant | -- | -- | * | |
| Camellia sinensis | Shoot | 900.0 | 1300.0 | * | |
| Camellia sinensis | Leaf | -- | -- | * | |
| Camellia sinensis | Leaf Essent. Oil | 21500.0 | 150000.0 | * | |
| Ginkgo biloba | Essential Oil | -- | -- | Jim Duke's personal files. | |
| Mentha spicata | Essential Oil | -- | -- | * | |
| Mentha spicata | Leaf | -- | -- | Duke, J. A. Writeups or information summaries on approximately 2,000 economic plants, USDA, ARS, Beltsville, MD 20705. | |
| Petroselinum crispum | Leaf | -- | -- | * | |
| Psidium guajava | Fruit | -- | 10000.0 | * | |
| Pueraria montana | Fruit Essent. Oil | -- | -- | * | |
| Rumex crispus | Essential Oil | -- | 111000.0 | * | |
| Tanacetum parthenium | Fruit Essent. Oil | -- | -- | * | |
| Trifolium pratense | Flower | -- | -- | * | |
| Trifolium pratense | Leaf | -- | -- | * | |
| Vaccinium myrtillus | Fruit Juice | -- | 0.06 | * | |
| Zea mays | Shoot | -- | -- | * | |
| Zea mays | Husk Essent. Oil | -- | 52000.0 | * | |
| Zea mays | Silk Stigma Style | -- | -- | * | |
| Zea mays | Leaf | -- | -- | * | |
| Zea mays | Silk Essent. Oil | -- | 5000.0 | * |