| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Carum carvi | Seed | 7.0 | 10.0 | 1.0 | * |
| Zingiber officinale | Rhizome | 2.0 | 5.2 | 1.0 | * |
| Cichorium endivia | Leaf | 2.0 | 2.4 | -0.4 | * |
| Zingiber officinale | Root | 2.0 | 5.2 | 1.8 | * |
| Brassica pekinensis | Leaf | 1.9 | 2.1 | -0.4 | * |
| Corylus avellana | Seed | 1.6 | 2.0 | -0.5 | * |
| Prunus dulcis | Seed | 1.2 | 1.6 | -0.6 | Furr, A.K., et al. 1979 |
| Brassica rapa | Seed | 1.0 | 2.0 | -0.5 | * |
| Capsicum frutescens | Fruit | 1.0 | 1.5 | -0.3 | * |
| Glycine max | Seed | 1.0 | 30.0 | 4.8 | * |
| Asparagus officinalis | Shoot | 0.9 | 1.8 | -1.1 | * |
| Cucumis melo | Fruit | 0.87 | 1.1 | -0.4 | * |
| Solanum melongena | Fruit | 0.7 | 0.8 | -0.5 | * |
| Piper nigrum | Fruit | 0.7 | 2.4 | -0.0 | * |
| Phaseolus vulgaris | Seed | 0.5 | 7.0 | 0.4 | * |
| Quercus phellos | Stem | 0.4 | 12.6 | 0.7 | * |
| Taraxacum officinale | Leaf | 0.4 | 5.6 | -0.3 | * |
| Carya glabra | Shoot | 0.4 | 55.0 | 1.8 | * |
| Rosa canina | Fruit | 0.4 | 1.0 | -0.5 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Diospyros virginiana | Leaf | 0.3 | 16.0 | -0.1 | * |