AR /  CP / 4N / SP

项目Item　　　　　　　　　　                             分析纯　　        化学纯
                                                                                      (AR)                     (CP)
含量[CaO(灼烧后)]Assay,%　　　                             ≥ 98.0                97.0
铁(Fe)Iron,%                                                             ≤ 0.015              0.03
重金属(以Pb计)Heavy metals,%                               ≤ 0.005              0.01
碱金属及镁(以MgO计)Alkali metals and
magnesium,%                                                         ≤ 0.5                  1.0
氨沉淀物Substances precipitated by
ammonia,%                                                            ≤ 0.2                   0.4
澄清度试验Clarty                                                    合格                      合格 
乙酸不溶物lnsoluble in acetic acid,%                       ≤ 0.05                 0.1
灼烧失重Ignition residue,%                                    ≤ 2                     5    
氯化物(Cl)Chloride,%                                             ≤ 0.003               0.01
硫酸盐(SO4)Sulfate,%                                            ≤ 0.1                   0.25
硝酸盐(NO3)Nitrate,%                                            ≤ 0.004               0.01