项目ltem                                                          分析纯　　　           　　化学纯
　　　　　　　　　　　　　　　　           (AR)                                  (CP)
含量(K4P2O7•3H2O)Assay,%                     ≥ 99.0                               98.0
水不溶物lnsoluble matter in water,%            ≤ 0.01                              0.02
氯化物(Cl)Chloride,%                                    ≤ 0.003                            0.006
硫酸盐(SO4)Sulfale,%                                   ≤ 0.01                              0.02
碳酸盐(CO3)Carbonate                                 合格　　　　　　           合格
氮化合物(N)Nitrogen compounds,%　　    ≤ 0.002                            0.002
铁(Fe)Iron,%                                                  ≤ 0.002                             0.002
砷(As)Arsenic,%                                            ≤ 0.0002                            0.0002
重金属(以Pb计)Heavy metals,%                   ≤ 0.002                              0.004