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GB/T 669-94 项目Item 分析纯 化学纯 (AR) (CP) 含量[Sr(NO3)2]Assay,% ≥99.5 99.0 澄清度试验Clarity 合格 合格 水不溶物lnsoluble matter in water,% ≤0.005 0.01 干燥失重Drying loss,% ≤0.1 0.5 游离酸(以HNO3)Free acid,% ≤0.013 0.013 氯化物(Cl)Chloride,% ≤0.0005 0.002 硫酸盐(SO4)Sulfale,% ≤0.005 0.01 钠(Na)Sodium,% ≤0.03 0.05 镁(Mg)Magnesium,% ≤0.005 0.01 钾(K)Potassium,% ≤0.02 0.05 钙(Ca)Calcium,% ≤0.0002 0.0005 钡(Ba)Barium,% ≤0.02 0.1 重金属(以Pb计)Heavy metals,% ≤0.0005 0.001
ACS级 项目名称Item ACS Grade 含量[Sr(NO3)2]Assay ≥99.0% 水不溶物Insoluble matter ≤0.01% 干燥失重Loss on drying ≤0.1% 氯化物(Cl)Chloride(Cl) ≤0.002% 硫酸盐(SO4)Sulfate ≤0.005% 钡(Ba)Barium(Ba) ≤0.05% 钙(CaCalcium(Ca) ≤0.05% 镁(Mg)Magnesium(Mg) ≤0.1% 钠(Na)Sodium(Na) ≤0.1 重金属(以Pb计)Heavy metals(as Pb) ≤5ppm 铁(Fe)Iron(Fe) ≤5ppm
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