| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Beta vulgaris | Root | -- | -- | Stuppner, H., Egger, R. 1996. Application of Capillary Zone Electrophoresis to the Analysis of Betalains from Beta vulgaris. J. Chromatogr, 735: 409-413. | |
| Opuntia ficus-indica | Fruit | -- | -- | * | |
| Spinacia oleracea | Pt | -- | -- | * |