项目Item | 优级纯(GR) | 分析纯(AR) | 化学纯(CP) |
含量(K2CO3):Assay%≥ | 99.5 | 99.0 | 98.0 |
澄清度试验Clarity | 合格 | 合格 | 合格 |
干燥失重loss on drying,% ≤ | 0.8 | 1.0 | 2.0 |
水不溶物Insoluble matter in water,%≤ | 0.005 | 0.005 | 0.03 |
氯化物Chloride,% ≤ | 0.001 | 0.003 | 0.01 |
硫化合物 Sulfur compounds,% ≤ | 0.003 | 0.002 | 0.01 |
总氮量(N)Total nitrogen,%≤ | 0.001 | 0.001 | 0.01 |
磷酸盐及硅酸盐 Phosphate and silicate,%≤ | 0.004 | 0.005 | 0.02 |
钠(Na)Sodium,% ≤ | 0.02 | 0.05 | 0.10 |
钙(Ca)Calcium,% ≤ | 0.002 | 0.02 | 0.02 |
镁(Mg)Magnesium,% ≤ | 0.0005 | 0.002 | 0.005 |
铝(Al)Aluminum,% ≤ | 0.005 | 0.005 | 0.005 |
铁(Fe)Iron,% ≤ | 0.0005 | 0.0005 | 0.002 |
铅(Pb)Lead,% ≤ | 0.0005 | 0.0005 | 0.001 |
铜(Cu)Copper,% ≤ | 0.0005 | 0.0005 | 0.001 |
砷(As)Arsenic,% ≤ | 0.00005 | 0.00005 | 0.00005 |