ITEM | GB/T1610-2009 INDEX | STANDARD | ||||
PREMIUM GRADE | FIRST GRADE | STANDARD GRADE | ELECTROPLATING LEVEL HIGH GRADE | |||
CrO3 | ≥99.80% | ≥99.60% | ≥99.20% | ≥99.7% | ||
SO42- | ≤0.05% | ≤0.10% | ≤0.20% | ≤0.06% | ||
INSOLUBLE | ≤0.01% | ≤0.03% | ≤0.05% | ≤0.01% | ||
Na+ | ≤0.04% | —— | —— | ≤0.05% | ||
TURBIDITY NTU | ≤5.05 | ≤15 | —— | ≤5 | ||
Cl- | —— | —— | —— | ≤0.06% |