| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Ribes nigrum | Fruit | 70.0 | 388.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Ribes rubrum | Fruit | 10.0 | 62.0 | -0.3 | * |
| Rosmarinus officinalis | Leaf | 660.0 | 2050.0 | 2.7 | USDA's Ag Handbook 8 and sequelae) |
| Sambucus nigra | Flower | -- | -- | * | |
| Sambucus nigra | Seed | -- | -- | * | |
| Schisandra chinensis | Seed | -- | -- | Chemical Constituents of Oriental Herbs (3 diff. books) | |
| Secale cereale | Seed | 100.0 | 110.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Sesamum indicum | Seed Oil | -- | 5000.0 | 1.4 | * |
| Sesamum indicum | Seed | 1490.0 | 1563.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Simarouba glauca | Seed | 1300.0 | 1420.0 | -0.3 | * |
| Sinapis alba | Seed | 570.0 | 674.0 | -0.3 | * |
| Skimmia arborescens | Seed | -- | 7000.0 | -0.1 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Solanum tuberosum | Tuber | 10.0 | 48.0 | USDA's Ag Handbook 8 and sequelae) | |
| Solanum melongena | Fruit | 10.0 | 124.0 | -0.3 | * |
| Spinacia oleracea | Plant | 21.0 | 475.0 | -1.0 | * |
| Spinacia oleracea | Leaf | -- | -- | * | |
| Terminalia catappa | Seed | 11850.0 | 14125.0 | 0.0 | * |
| Tetragonia tetragonioides | Leaf | 30.0 | 500.0 | 0.1 | * |
| Trigonella foenum-graecum | Seed Oil | -- | 2100.0 | -0.7 | * |
| Triticum aestivum | Plant | -- | -- | * |