项目ltem                                                                 分析纯                       化学纯

                                                                                (AR)                           (CP)
含量(Kl)Assay,%                                                   99%                        98.0%

pH(50g/L溶液，25℃)pH of water sol-

ution                                                                       6.0-8.0                  6.0-8.0

澄清度试验Clarity                                                 合格                         合格

水不溶物lnsoluble matter in water,%                    0.01                          0.02

氯化物及溴化物(以Cl计)Chloride and

bromide,%                                                             0.02                          0.05

碘酸盐及碘(以IO3计)lodate and iodine                  0.002                       0.005

硫酸盐(SO4)Sulfate,%                                         0.005                       0.01

磷酸盐(PO4)Phosphate,%                                  0.002                        --

总氮量(N)Total nitrogen,%                                  0.002                       0.002

钠(Na)Sodium,%                                                  0.1                            --

镁(Mg)Magnesium,%                                          0.002                       0.005

钙(Ca)Calcium,%                                                0.002                       0.005

铁(Fe)Iron ,%                                                       0.0003                     0.0005

钡(Ba)Barium,%                                                 0.002                        0.004

重金属(以Pb计)Heavy metals,%                      0.0005                      0.001

砷(As)Arsenic,%                                                0.00002                    0.0002
物质Reducing substances                               合格                             --