GB/T 9856-88
项目Item                                                   分析纯       化学纯
                                                                      (AR)         (CP)
含量(Na2CO3.10H2O)Assay,%                      ≥  99.0      99.0
澄清度试验Clarity                                         合格           合格
水不溶物Insoluble matter in water,%        ≤  0.005     0.01
氯化物(Cl)Chloride,%                                   ≤  0.001      0.003
总硫量(以SO4计)Total Sulfate,%                  ≤  0.003      0.005
铝(Al)Aluminum,%                                       ≤  0.0005    0.003
钾(K)Potassium,%                                       ≤  0.003      0 .01
钙(Ca)Calcium,%                                        ≤  0.003       0.008
铁(Fe)Iron,%                                                ≤  0.0002      0.0003
重金属(以Pb计)Heavy metals,%                ≤  0.0002       0.0005
磷酸盐(PO4)Phosphate,%                            ≤  0.0005    0.002
硅酸盐(SiO3)Silicate,%                                 ≤  0.001       0.005
总氮量(N)Total nitrogen,%                            ≤  0.0005       0.001
镁(Mg)Magnesium,%                                     ≤  0.0003     0.002