| 质量标准： |
GB/T 1396-93
项目Item 分析纯 化学纯
(AR) (CP)
含量［(NH42SO4)Assay,% ≥99.0 99.0
pH(50g/L溶液，25℃) 4.8-6.0 4.8-6.0
澄清度试验Clarity 合格 合格
水不溶物Insoluble matter in water,% ≤0.002 0.01
灼烧残渣(以硫酸盐计)Ignition residue,% ≤0.01 0.5
氯化物(Cl)Chloride,% ≤0.0005 0.001
硝酸盐(NO3)Nitrate,% ≤0.001 0.005
磷酸盐(PO4)Phosphate,% ≤0.0005 0.002
钙(Ca)Calcium,% ≤0.005 --
铁(Fe)Iron,% ≤0.0002 0.0005
砷(As)Arsenic,% ≤0.00002 0.0002
重金属(以Pb计)Heavy metals,% ≤0.0005 0.002
品级Grade 优级纯
(GR)
含量assay ≥99.5% (T)
不溶物insoluble matter, passes filter test
灼烧残渣Residue on ignition ≤0.01% (as SO4)
干燥失重loss on drying ≤0.1% , 110 °C
pH 5.0-6.0 (25 °C, 1 M in H2O)
水溶性solubility H2O: soluble1 M at 20 °C, clear, colorless
氯chloride (Cl-): ≤5 ppm
硝酸根nitrate (NO3-): ≤10 ppm
硫酸根phosphate (PO43-): ≤5 ppm
阳离子cation traces
Al: ≤5 ppm
As: ≤0.2 ppm
Ba: ≤5 ppm
Bi: ≤5 ppm
Ca: ≤10 ppm
Cd: ≤1 ppm
Co: ≤5 ppm
Cr: ≤5 ppm
Cu: ≤2 ppm
Fe: ≤2 ppm
K: ≤50 ppm
Li: ≤5 ppm
Mg: ≤5 ppm
Mn: ≤5 ppm
Mo: ≤5 ppm
Na: ≤50 ppm
Ni: ≤5 ppm
Pb: ≤2 ppm
Sr: ≤5 ppm
Zn: ≤1 ppm
λ 1 M in H2O
UV absorption
λ: 260 nm A: ≤0.037
λ: 280 nm A: ≤0.030
ACS级
项目名称Item ACS Grade
含量Assay ≥99.0%
pH(5%溶液,25.0℃)pH 5.0-6.0
不溶物Insoluble matter ≤0.005
灼烧残渣Residue after ignition ≤0.005%
氯化物(Cl)Chloride(Cl) ≤5ppm
硝酸盐(NO3)Nitrate ≤0.001%
磷酸盐(PO4)Phosphate ≤5ppm
重金属(以Pb计)Heavy metals(as Pb) ≤5ppm
铁(Fe)Iron(Fe) ≤5ppm
品级Grade 用于分子生物学
(for molecular biology, ≥99.0%)
外观Appearance 白色粉末
红外光谱鉴别Infrared spectrometry Conforms
含量assay ≥99.0%(中和滴定）
水溶解试验solubility in water CLEAR ,2G/3ML WATER
不溶物Insoluble matter ≤0.005%
氯chloride (Cl-): ≤5 ppm
铜Cu: ≤5 ppm
铁Fe: ≤5 ppm
锌Zn: ≤5 ppm
重金属heavy metals (as Pb): ≤2 ppm
UV ABSORBANCE,1 M SOLUTION
A1M/260 ≤0.03
A1M/280 ≤0.025
DNase, RNase, and protease none detected
品级Grade 用于植物细胞培养
(plant cell culture tested, ≥99.0%)
外观Appearance 白色粉末
红外光谱鉴别Infrared spectrometry Conforms
含量assay ≥99.0%(中和滴定）
水溶解试验solubility in water CLEAR ,2G/3ML WATER
不溶物Insoluble matter ≤0.005%
氯chloride (Cl-): ≤5 ppm
铜Cu: ≤5 ppm
铁Fe: ≤5 ppm
锌Zn: ≤5 ppm
重金属heavy metals (as Pb): ≤2 ppm
植物细胞培养Plant cell culture test PASSES
≥99.99% metals basis：
外观Appearance 白色结晶
X-射线衍射分析X-Ray Diffraction Conforms to standard
纯度Purity ≥99.99% Based on Trace Metals Impurities of ICP
ICP assay confirms sulfur component.
痕量金属分析Trace Metal Analysis ≤100ppm by ICP Atomic emission
灼烧残渣residue on ignition ≤0.005%
不溶物insoluble matter ≤0.005% (c=10%, H2O)
氯chloride ≤5 ppm
铁iron ≤5 ppm
重金属heavy metals ≤5 ppm (as pb)
硝酸根nitrate ≤0.001%
pH 5.0 - 6.0 ， 25 °C (c=5%, H2O)
磷酸盐phosphate ≤5 ppm
≥99.999% metals basis：
外观Appearance 白色结晶或结晶粉末
X-射线衍射分析X-Ray Diffraction Conforms to standard
红外光谱鉴别Infrared spectrometry Conforms to Structure
纯度Purity ≥99.999% Based on Trace Metals Impurities of ICP
S 23,7 - 24,9 % (Gravimetric Analysis With Barium Chloride)
SO4 71,2 - 74,2 % (Gravimetric Analysis With Barium Chloride)
痕量金属分析Trace Metal Analysis ≤20ppm by ICP Atomic emission
(Ca、Cr、Fe、Mg、Na)
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