Table 3.
National hygienic standard value of heavy metal (HM) content in food in China (mg/kg).
| Element | Food | Vegetables | Beans | Tubers | Fruits | Series of National Standard |
|---|---|---|---|---|---|---|
| Pb | 0.4 | 0.2 | 0.8 | 0.4 | 0.2 | GB14935-1994 |
| Cd | Rice 0.2 | 0.05 | 0.05 a | 0.05 a | 0.03 | GB15201-1994 |
| Flour 0.1 | ||||||
| Coarse Cereals 0.05 | ||||||
| Hg | 0.02 | 0.01 | 0.01 b | 0.01 | 0.01 | GB2762-1994 |
| Cu | 10 | 10 | 20 | 20 c | 10 | GB15199-1994 |
| Cr | 1.0 | 0.5 | 1.0 | 0.5 | 0.5 | GB14961-1994 |
| Zn | 50 | 20 | 100 | 100 d | 5 | GB13106-1991 |
| As | 0.7 | 0.5 | 0.5 e | 0.5 e | 0.5 | GB4810-1994 |
| Ni | 0.4 | 0.3 | 0.3 f | 0.3 f | 0.2 | [33] |
a Standard value of Cd in beans and tubers referenced to the corresponding value of vegetables; b Standard value of Hg in beans referenced to the corresponding value of vegetables, tubers, and fruits; c Standard value of Cu in tubers referenced to the corresponding value of beans; d Standard value of Zn in tubers referenced to the corresponding value of beans; e Standard value of As in tubers and beans referenced to the corresponding value of vegetables and fruits; f Standard value of Ni in tubers and beans referenced to the corresponding value of vegetables.