AR

Q/(HG)SJ 745-1997
项目Item                                                                    分析纯        化学纯
                                                                                           (AR)          (CP)
含量(CaSO4·2H2O)Assay,%　　　                             ≥99.0         97.0
澄清度试验Clarity                                                     合格      合格
盐酸不溶物盐酸不溶物lnsoluble in dilute
hydrochloric acid,%                                                   ≤0.025        0.05
氯化物(Cl)Chloride,%                                                ≤0.002        0.005
硝酸盐(NO3)Nitrate,%                                               ≤0.002        0.005
铵盐(NH4)Ammonium,%                                           ≤0.005        0.015
碳酸盐(CO3)Carbonate,%                                          ≤0.05         0.1
铁(Fe)Iron,%                                                           ≤0.0005       0.001
重金属(以Pb计)Heavy metals,%                                 ≤0.001        0.002
碱金属及镁(MgO)Alkali metuls and                             ≤0.2          0.5
magnesium,%                           

ACS级                   
项目名称Item                                                                  ACS Grade
含量(CaSO4·2H2O)Assay                                                 98.0-102.0%
稀盐酸不溶物Insoluble in dilute hydrochloric acid               ≤0.02%
氯化物(Cl)Chloride(Cl)                                                     ≤0.005%
硝酸盐(NO3)Nitrate                                                          Passes test
碳酸盐(以BaCO3计)Carbonate                                           Passes test
重金属(以Pb计)Heavy metals(as Pb)                                  ≤0.002%
铁(Fe)Iron(Fe)                                                                 ≤0.001%
镁(Mg)Magnesium(Mg)                                                      ≤0.02%
钾(K)Potassium(K)                                                             0.005%
钠(Na)Sodium(Na)                                                             ≤0.02%