| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Brassica oleracea | Stem | -- | -- | * | |
| Capsicum frutescens | Fruit | -- | -- | * | |
| Citrullus lanatus | Fruit Juice | -- | -- | * | |
| Citrus sinensis | Fruit Juice | -- | -- | Jim Duke's personal files. | |
| Citrus sinensis | Fruit | -- | -- | * | |
| Humulus lupulus | Flower | -- | -- | * | |
| 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. | |
| Phaseolus vulgaris | Stem Essent. Oil | -- | -- | * | |
| Psidium guajava | Fruit | -- | 3000.0 | * | |
| Rosmarinus officinalis | Resin, Exudate, Sap | -- | -- | * | |
| Zea mays | Silk Stigma Style | -- | -- | * |