规格 指标名称 |
分析纯-AR |
化学纯-CP |
高纯 |
含量(NaH2PO4·2H2O)/% |
≥99.0 |
≥98.0 |
≥98.0 |
PH值(50g/L,25℃) |
4.2~4.6 |
4.2~4.6 |
4.2~4.6 |
澄清度试验 |
合格 |
合格 |
- |
水不溶物 |
≤0.01 |
≤0.02 |
≤0.05 |
氯化物(Cl) |
≤0.005 |
≤0.01 |
≤0.014 |
硫酸盐(SO4) |
≤0.005 |
≤0.01 |
≤0.25 |
硝酸盐(NO3) |
≤0.001 |
≤0.002 |
- |
铵(NH4) |
≤0.002 |
- |
- |
钾(K) |
≤0.02 |
≤0.1 |
- |
铁(Fe) |
≤0.001 |
≤0.005 |
- |
砷(As) |
≤0.0002 |
≤0.0005 |
≤0.005 |
重金属(以Pb计) |
≤0.001 |
≤0.005 |
≤0.002 |
氨沉淀物/% |
≤0.01 |
≤0.02 |
- |
氟化物(F) /% |
- |
- |
≤0.005 |