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GB/T 667-1995 项目Item 分析纯 化学纯 (AR) (CP) 含量[Zn(NO3)2·6H2O) Assay,% ≥ 99.0 98.0 pH(50g/L溶液,25℃) ≤ 3.5 3.5 澄清度试验Clarity 合格 合格 水不溶物Insoluble matter in water,% ≤ 0.001 0.002 氯化物(Cl)Chloride,% ≤ 0.001 0.002 硫酸盐(SO4)Sulfate,% ≤ 0.002 0.005 铁(Fe)Iron,% ≤ 0.0003 0.001 铅(Pb)Lead,% ≤ 0.005 0.02 硫化铵不沉淀物(以硫酸盐计)Substances not precipitated by ammonium sulfide,% ≤ 0.10 0.15
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