AR

Q/(HG)SJ 741-1997
项目Item                                                                            分析纯　         化学纯
（AR）             （CP）
含量（C4H6O4Cd·2H2O）Assay,%                         ≥ 99.5             98.0
pH(50g/L溶液，25℃)                                                     5.0                     5.0
铝(Al)Aluminum,%                                                           ≤ 0.005            0.01
铁(Fe)Iron,%                                                                    ≤ 0.0005          0.001
铜(Cu)Copper,%                                                             ≤ 0.0005          0.001
锌(Zn)Zinc,%                                                                   ≤ 0.002             0.005
铅(Pb)Lead,%                                                                ≤ 0.003              0.006
硫化铵不沉淀物(以硫酸盐计)Substances not
precipitated by ammonium sulfide,%                          ≤ 0.05               0.20
澄清度试验Clarity                                                         合格                    合格
水不溶物Insoluble matter in water,%                         ≤ 0.003               0.005
氯化物(Cl)Chloride,%                                                 ≤ 0.002                0.005
硫酸盐(SO4)Sulfate,%                                                ≤ 0.005               0.01
总氮量(N)Total nitrogen,%                                          ≤ 0.002               0.004