质量标准:GB/T 666-93
项目Item                                           分析纯    化学纯
                                                    (AR)     (CP)
含量(ZnSO4·7H2O)Assay,%                          ≥ 99.5     99.0
pH(50g/L溶液,25℃)                                4.4-6.0   4.4-6.0
澄清度试验Clarity                                     合格    合格
水不溶物Insoluble matter in water,%               ≤ 0.01     0.02
氯化物(Cl)Chloride,%                              ≤ 0.0005   0.002
总氮量(N)Total nitrogen,%                         ≤ 0.001    0.002
砷(As)Arsenic,%                                   ≤ 0.00005  0.0002
锰(Mn)Manganese,%                                 ≤ 0.0003   0.001
铁(Fe)Iron,%                                      ≤ 0.0005   0.002
铜(Cu)Copper,%                                    ≤ 0.001    0.005
镉(Cd)Cadmium,%                                   ≤ 0.0005   0.002
铅(Pb)Lead,%                                      ≤ 0.001    0.01
硫化铵不沉淀物(以硫酸盐计)Substances not
precipitated by ammonium sulfide,%                ≤ 0.05     0.20
品级Grade                               用于植物细胞培养  
                                   (plant cell culture tested)
外观Appearance                          白色粉末
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥99.5% (EDTA titration)
水溶解试验solubility in water           Clear,10g/100ml 水
Plant cell culture test                 PASS