性状 (characters) |
红色结晶 (red crystalline) |
合格 (conform) |
含量 (assay) |
99.0% |
99.5 % |
水不溶物 (water insoluble matter) |
0.01% |
0.002% |
硫酸盐 (sulphates) |
0.01% |
0.005% |
硝酸盐 (nitrates) |
0.02% |
0.01% |
锰 (manganese) |
0.005% |
0.002% |
铁 (iron) |
0.001% |
0.0005% |
镍 (nickel) |
0.03% |
0.01% |
锌 (zinc) |
0.02% |
0.01% |
重金属 (heavy metal) |
0.005% |
0.0028% |
碱金属及碱土金属(alkali earths and alkaline earths) |
0.2% |
0.12% |