性状(characters) |
白色结晶粉末 (white crystalline powder) |
合格(conform) |
含量(assay) |
99.5% |
99.8% |
澄清度实验 (appearance of solution) |
应符合规定 (comply with the standard) |
合格(conform) |
水溶液反应 (aqueous reaction) |
应符合规定 (comply with the standard) |
合格(conform) |
溴化物(bromides) |
0.01% |
0.005% |
硫酸盐(sulphates) |
0.002% |
0.0007% |
磷酸盐(phosphate) |
0.001% |
0.0004% |
砷(arsenic) |
0.00005% |
0.00002% |
碘(iodate) |
0.002% |
0.001% |
钙(calcium) |
0.005% |
0.002% |
铁(iron) |
0.0002% |
0.0001% |
钾(potassium) |
0.02% |
0.005% |
镁(magnesium) |
0.002% |
0.0008% |
钡(barium) |
0.001% |
0.0005% |
重金属(heavy metal) |
0.0005% |
0.0002% |
氮化合物(nitrogen compounds) |
0.001% |
0.0008% |
干燥失重(loss on drying) |
0.5% |
0.25% |
亚铁氰化物(ferrocyanide) |
0.0001% |
0.00007% |
水不溶物(water-insoluble) |
0.005% |
0.003% |