|
Item |
Standard |
Results |
|
Appearance |
Dark brown or grey green powder |
Conforms |
|
Total iron(calculated on the dried basis) |
19.0-24.0% |
21.0% |
|
Fe2+ (calculated on the dried basis) |
20.0-23.7% |
22.0% |
|
Fe3+ (calculated on the dried basis) |
≤2.0% |
0.02% |
|
Nitrogen(calculated on the dried basis) |
10.0-12.0% |
10.9% |
|
Loss on drying |
≤7.0% |
5.0% |
|
Pb |
≤1.0mg/kg |
0.10mg/kg |