| ELEMENTS (mg/kg/day) | ||
REFERENCE VALUES | Pb | Zn | REFERENCE |
Toxic reference factor | 5 | 1 | [25] |
Geochemical background value (Bn) | 20 | 95 | [26] |
Background value of element | 85 | 140 | [26] |
Oral reference doses (RfD) mg/kg/day | 0.3 | 0.004 | [27] [28] |
Cancer slope factor | 0.0085 | - | [29] |