性状 (characters) |
暗绿色结晶 (green crystalline) |
合格 (conform) |
含量 (assay) |
99.0% |
99.5% |
水不溶物 (water insoluble matter) |
0.003% |
0.001% |
硫酸盐 (sulphates) |
0.02% |
0.01% |
铵盐 (ammonium salt) |
0.02% |
0.008% |
钠 (sodium) |
0.05% |
0.02% |
铝 (aluminum) |
0.02% |
0.012% |
钾 (potassium) |
0.05% |
0.03% |
钙 (calcium) |
0.005% |
0.002% |
铁 (iron) |
0.003% |
0.001% |