| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Aloe vera | Plant | -- | -- | * | |
| Aloe vera | Juice | -- | -- | * | |
| Aloe vera | Leaf | -- | 45.4 | * | |
| Cassia tora | Seed | -- | -- | * | |
| Cassia grandis | Plant | -- | -- | * | |
| Frangula alnus | Plant | -- | -- | * | |
| Frangula purshiana | Tissue Culture | -- | -- | * | |
| Frangula purshiana | Bark | -- | -- | * | |
| Rheum officinale | Bulb | -- | -- | * | |
| Rheum officinale | Root | -- | -- | * | |
| Rheum palmatum | Tissue Culture | -- | -- | * | |
| Rheum officinale | Plant | -- | -- | * | |
| Rheum palmatum | Rhizome | -- | -- | * | |
| Rheum officinale | Rhizome | -- | -- | * | |
| Rheum palmatum | Root | -- | 2030.0 | * | |
| Senna occidentalis | Seed | -- | -- | * | |
| Senna alata | Plant | -- | -- | * | |
| Senna alexandrina | Plant | -- | -- | Tramil |