| 质量标准： |
QB/T 658-88
项目Item 优级纯 分析纯 化学纯
(GR) (AR) (CP)
含量(NH4Cl)Assay,% ≥99.8 99.5 98.5
pH(50g/L溶液，25℃) 4.5-5.5 4.5-5.5 4.5-5.5
澄清度试验Clarity 合格 合格 合格
水不溶物Insoluble matter in water,% ≤0.002 0.005 0.01
灼烧残渣（以硫酸盐计）Ignition residue,% ≤0.005 0.02 0.05
硫酸盐(SO4)Sulfate,% ≤0.002 0.005 0.005
磷酸盐(PO4)Phosphate,% ≤0.0002 0.0005 0.001
钠(Na)Sodium,% ≤0.005 0.005 --
镁(Mg)Magnesium,% ≤0.0005 0.001 0.002
钾(K)Potassium,% ≤0.005 0.005 --
钙(Ca)Calcium,% ≤0.0005 0.001 0.002
铁(Fe)Iron,% ≤0.0002 0.0005 0.001
镍(Ni)Nickel,% ≤0.0001 -- --
铜(Cu)Copper,% ≤0.0002 -- --
锌(Zn)Zinc,% ≤0.0002 -- --
铅(Pb)Lead,% ≤0.0001 -- --
项目名称Item ACS Grade
含量Assay ≥99.5%
pH(5%溶液，25℃)pH 4.5-5.5
不溶物Insoluble matter ≤0.005%
灼烧残渣Residue after ignition ≤0.01%
钙(Ca)Calcium(Ca) ≤0.001%
镁(Mg)Magnesium(Mg) ≤5ppm
重金属(以Pb计)Heavy metals(as Pb) ≤5ppm
铁(Fe)Iron(Fe) ≤0.0002%
磷酸盐(PO4)Phosphate ≤0.0002%
硫酸盐(SO4)Sulfate ≤0.002%
品级Grade 分子生物学级
(for molecular biology, ≥99.5%)
外观Appearance 白色粉末
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.5%
重金属(以Pb计)Heavy metals(as Pb) ≤0.0005%
铁(Fe)Iron(Fe) ≤0.0002%
磷酸盐Phosphate ≤0.0002%
硫酸盐Sulfate ≤0.002%
水溶解试验solubility in water 合格
DNase, RNase, protease, none detected
品级Grade 细胞培养专用
(cell culture tested, ≥99.5%)
外观Appearance 白色粉末
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity ≥99.5%
重金属(以Pb计)Heavy metals(as Pb) ≤0.0005%
铁(Fe)Iron(Fe) ≤0.0002%
磷酸盐Phosphate ≤0.0002%
硫酸盐Sulfate ≤0.002%
水溶解试验solubility in water 合格
细胞培养测试cell culture test Pass
品级Grade 药典注射级
(Ph. Eur., BP, USP, FCC )
含量assay 99.5-100.5% (以干基计)
酸度和碱度acidity or alkalinity, complies
残留溶剂residual solvents, complies
硫氰酸thiocyanate (SCN), complies
灼烧残渣ign. residue ≤0.1% (as SO4)
干燥损失loss on drying ≤0.5% loss on drying, 105 °C
pH 4.6-6.0 (20 °C, 5%)
痕量阴离子anion traces by ICP Atomic emission AND AAS
溴bromide (Br-): in accordance
碘iodide (I-): in accordance
硫酸根sulfate (SO42-): ≤100 ppm
痕量阳离子cation traces by ICP Atomic emission
As: ≤3 ppm
Ca: ≤100 ppm
Cu: ≤20 ppm
Fe: ≤20 ppm
Mg: ≤10 ppm
Pb: ≤4 ppm
Zn: ≤20 mg/kg
溶解性suitability complies for appearance of solution
99.999%:
外观Appearance 白色结晶粉末
红外光谱鉴别Infrared spectrometry Conforms
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.999% Based On Trace Metals Analysis
痕量金属杂质Trace Metal Analysis 20ppm by ICP Atomic emission
(Li、Na、K、Ni、Cs、Mg、Ca、Ba、Zn、Al、Cr、Mn、As、Fe)
99.99%:
外观Appearance 白色结晶粉末
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.99% Based On Trace Metals Analysis
痕量金属杂质Trace Metal Analysis 200ppm by ICP Atomic emission
(Ba、Ca、Mg、Na)
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