| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Ribes rubrum | Fruit | 0.03 | 0.6 | -0.6 | * |
| Rosa canina | Fruit | 0.4 | 1.0 | -0.5 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Rubus chamaemorus | Fruit | 0.2 | 1.25 | -0.4 | * |
| Sassafras albidum | Stem | 0.08 | 1.8 | -1.2 | * |
| Sassafras albidum | Leaf | 0.23 | 3.4 | -0.4 | * |
| Sesamum indicum | Seed | -- | 1.2 | -0.7 | * |
| Simmondsia chinensis | Seed | -- | 4.0 | -0.1 | * |
| Sinapis alba | Seed | -- | 3.6 | -0.2 | * |
| Solanum tuberosum | Tuber | 0.02 | 2.6 | * | |
| Solanum melongena | Fruit | 0.7 | 0.8 | -0.5 | * |
| Sorbus aucubaria | Fruit | 0.1 | 0.4 | -0.7 | * |
| Spinacia oleracea | Plant | 0.05 | 5.7 | -0.4 | * |
| Symphoricarpos orbiculatus | Stem | 0.2 | 4.4 | -0.7 | * |
| Syzygium aromaticum | Fruit | -- | 2.4 | -0.0 | * |
| Syzygium aromaticum | Flower | -- | 2.4 | -1.0 | * |
| Taraxacum officinale | Root | 0.3 | 5.6 | 2.0 | * |
| Taraxacum officinale | Leaf | 0.4 | 5.6 | -0.3 | * |
| Taraxacum officinale | Plant | -- | -- | * | |
| Trachyspermum ammi | Fruit | -- | 1.2 | -0.4 | * |
| Triticum aestivum | Seed | -- | 2.37 | -0.5 | * |