| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Brassica rapa | Leaf | 106.0 | 5844.0 | 0.7 | USDA's Ag Handbook 8 and sequelae) |
| Brassica pekinensis | Leaf | 2850.0 | 3150.0 | -0.4 | * |
| Brassica oleracea var. viridis l. | Leaf | 170.0 | 2786.0 | -0.5 | * |
| Brassica oleracea var. botrytis l. | Flower | 115.0 | 2250.0 | -0.4 | * |
| Brassica oleracea var. botrytis l. | Leaf | 214.0 | 3072.0 | -0.4 | * |
| Brassica juncea | Leaf | 353.0 | 3837.0 | -0.1 | * |
| Broussonetia papyrifera | Fruit | -- | 4030.0 | 0.9 | * |
| Bupleurum chinense | Root | 550.0 | 5000.0 | 1.3 | * |
| Camellia sinensis | Leaf | -- | 2200.0 | -0.7 | * |
| Canavalia ensiformis | Seed | -- | 2190.0 | -0.3 | * |
| Capsicum annuum | Fruit | 604.0 | 2340.0 | 0.1 | * |
| Capsicum frutescens | Fruit | 230.0 | 2203.0 | 0.0 | USDA's Ag Handbook 8 and sequelae) |
| Carica papaya | Fruit | 110.0 | 815.0 | -0.6 | * |
| Carthamus tinctorius | Flower | 260.0 | 1860.0 | -0.7 | * |
| Carum carvi | Seed | 2070.0 | 2950.0 | 0.0 | * |
| Carum carvi | Fruit | 2580.0 | 2863.0 | 0.3 | * |
| Carya ovata | Shoot | 125.0 | 21600.0 | 2.0 | * |
| Carya glabra | Shoot | 144.0 | 24200.0 | 2.3 | * |
| Carya ovata | Seed | -- | 900.0 | -0.8 | * |
| Carya illinoensis | Seed | -- | 980.0 | -0.8 | * |