Sulfate yenye feri
Vipimo
| Kipengee | Kawaida |
| Fe2+ | ≥17.6 % |
| Nyenzo isiyoyeyuka | ≤0.1 % |
| Hg | ≤0.00001 % |
| Cr | ≤0.0005 % |
| As | ≤0.002 % |
| Pb | ≤0.002 % |
Andika ujumbe wako hapa na ututumie
Vipimo
| Kipengee | Kawaida |
| Fe2+ | ≥17.6 % |
| Nyenzo isiyoyeyuka | ≤0.1 % |
| Hg | ≤0.00001 % |
| Cr | ≤0.0005 % |
| As | ≤0.002 % |
| Pb | ≤0.002 % |