TEST ITEMS | STANDARD | |
GRADE ONE | GRADE TWO | |
MAIN CONTENT | ≥90.0% | ≥90.0% |
TiO2 | ≤0.75% | ≤1.0% |
INSOLUBLE | ≤0.50% | ≤0.50% |
FREE ACID (AS H2SO4) | ≤1.00% | _ |
ARSENIC | ≤2（mg/kg） | ≤2（mg/kg） |
PB | ≤5（mg/kg） | ≤5（mg/kg） |
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