| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Brassica oleracea var. botrytis l. | Leaf | 255.0 | 8990.0 | * | |
| Brassica oleracea var. italica | Leaf | 255.0 | 8990.0 | * | |
| Brassica oleracea var. botrytis l. | Flower | -- | 990.0 | * | |
| Brassica oleracea var. gemmifera | Seed | -- | -- | Jeffery B. Harborne and H. Baxter, eds. 1983. Phytochemical Dictionary. A Handbook of Bioactive Compounds from Plants. Taylor & Frost, London. 791 pp. | |
| Raphanus sativus | Root | -- | -- | * | |
| Brassica oleracea var. capitata l. | Leaf | -- | -- | Jim Duke's personal files. |