| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Artemisia dracunculus | Leaf | -- | -- | * | |
| Artemisia capillaris | Bud | -- | -- | * | |
| Artemisia vulgaris | Plant | -- | -- | Bisset, N.G., ed. 1994. Herbal Drugs and Phytopharmaceuticals. CRC Press. Boca Raton, FL. 566 pp. | |
| Artemisia annua | Plant | -- | -- | * | |
| Artemisia dracunculus | Plant | -- | -- | * | |
| Atropa bella-donna | Root | -- | -- | * | |
| Avena sativa | Root | -- | 10.0 | -1.0 | * |
| Avena sativa | Sprout Seedling | -- | -- | * | |
| Azadirachta indica | Plant | -- | -- | * | |
| Baptisia tinctoria | Plant | -- | -- | * | |
| Brunfelsia uniflorus | Plant | -- | -- | * | |
| Capsicum frutescens | Fruit | -- | -- | * | |
| Capsicum annuum | Fruit | -- | -- | CRC Handbook of Medicinal Herbs and/or CRC Handbook of Proximate Analyses | |
| Carum carvi | Plant | -- | -- | Wealth of India. | |
| Carum carvi | Root | -- | -- | * | |
| Casimiroa edulis | Bark | -- | -- | List, P.H. and Horhammer, L., Hager's Handbuch der Pharmazeutischen Praxis, Vols. 2-6, Springer-Verlag, Berlin, 1969-1979. | |
| Centaurea cyanus | Shoot | -- | -- | Jim Duke's personal files. | |
| Chamaemelum nobile | Plant | -- | -- | * | |
| Chenopodium album | Plant | -- | -- | * | |
| Cichorium intybus | Plant | -- | -- | * |