| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Secale cereale | Seed | 7010.0 | 7870.0 | -0.4 | USDA's Ag Handbook 8 and sequelae) |
| Sechium edule | Fruit | 450.0 | 6430.0 | 1.1 | * |
| Senna obtusifolia | Seed | -- | 6890.0 | -0.6 | * |
| Sesamum indicum | Seed | 5890.0 | 19918.0 | 1.3 | * |
| Silybum marianum | Seed | -- | -- | * | |
| Sinapis alba | Seed | 13120.0 | 14038.0 | 0.4 | * |
| Solanum tuberosum | Tuber | 620.0 | 5700.0 | 0.2 | * |
| Solanum melongena | Fruit | 320.0 | 5452.0 | 0.7 | * |
| Spinacia oleracea | Plant | 1340.0 | 15914.0 | 1.7 | USDA's Ag Handbook 8 and sequelae) |
| Stachys officinalis | Shoot | -- | -- | * | |
| Theobroma cacao | Seed | -- | 900.0 | -1.5 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Thymus vulgaris | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Tilia sp. | Fruit | -- | -- | * | |
| Trigonella foenum-graecum | Seed | 10630.0 | 14366.0 | 0.5 | * |
| Triticum aestivum | Seed | 4830.0 | 5635.0 | -0.8 | * |
| Urtica dioica | Leaf | -- | -- | Jim Duke's personal files. | |
| Vaccinium corymbosum | Fruit | 280.0 | 1819.0 | -0.7 | * |
| Valerianella locusta | Leaf | 790.0 | 10970.0 | 0.1 | * |
| Vicia faba | Seed | 2300.0 | 12100.0 | 0.2 | USDA's Ag Handbook 8 and sequelae) |
| Vigna angularis | Seed | 7560.0 | 8734.0 | -0.3 | * |