项目 分析纯 化学纯
(AR) （CP）
pH（50g/L，25℃） 6.0～7.0 6.0～7.0
澄清度试验 合格 合格
含量Assay ≥98.0% 97.0%
硫酸盐Sulfate ≤0.005% 0.01%
氯化物(Cl)Chloride ≤0.001% 0.004%
重金属(以Pb计)Heavy metals ≤0.0002% 0.0004％
铁(Fe)Iron ≤0.0005% 0.001%
灼烧残渣Ignition residue ≤0.01% 0.04%
品级Grade 超纯级
(ultra pure)
含量assay ≥99.0% (calc. based on dry substance, NT)
不溶物insoluble matter, passes filter test
水分water ≤2%
灼烧残渣Residue on ignition (900°C) ≤0.1% (as SO4)
pH 5.5-7.5 (25 °C, 1 M in H2O)
熔点Melting point 119-121 °C
痕量阴离子anion traces by ICP-MS
氯chloride (Cl-): ≤50 ppm
硫酸根sulfate (SO42-): ≤50 ppm
痕量阳离子cation traces
Al: ≤5 ppm
As: ≤0.1 ppm
Ba: ≤5 ppm
Bi: ≤5 ppm
Ca: ≤10 ppm
Cd: ≤5 ppm
Co: ≤5 ppm
Cr: ≤5 ppm
Cu: ≤5 ppm
Fe: ≤5 ppm
K: ≤50 ppm
Li: ≤5 ppm
Mg: ≤5 ppm
Mn: ≤5 ppm
Mo: ≤5 ppm
Na: ≤50 ppm
Ni: ≤5 ppm
Pb: ≤5 ppm
Sr: ≤5 ppm
Zn: ≤5 ppm
λ 1 M in H2O
紫外吸收UV absorption
λ: 260 nm A: ≤0.01
λ: 280 nm A: ≤0.01
≥99.995% （metals basis）：
外观Appearance White Moist Crystals
红外光谱鉴别Infrared spectrometry Conforms to Structure
纯度Purity ≥99.995% Based On Trace Metals Analysis
痕量金属分析Trace Metal Analysis 50ppm by ICP Atomic emission
总金属杂质Total Metallic Impurities (Al、As、Ba、Na)
品级Grade 色谱纯
(for HPLC，≥99.0%)
纯度Purity ≥99.0% (dried material, NT)
水分 water ≤2%
pH 5.5-7.5 (20 °C, 10% in H2O)
熔点Melting point 119-121 °C
水溶性solubility H2O: soluble0.1 g/mL at 25 °C, clear, colorless
λ 10 % in H2O
紫外吸光值UV absorption
λ: 250 nm A: ≤0.05
λ: 260 nm A: ≤0.04
λ: 270 nm A: ≤0.03
λ: 280 nm A: ≤0.02
λ: 500 nm A: ≤0.02
for RP gradient test corresponds to standard
for filter test corresponds to standard
品级Grade LC-MS专用
(eluent additive for LC-MS，≥99.0%)
纯度Purity ≥99.0% (dried material, NT)
不溶物insoluble matter, passes filter test
水分water ≤2%
灼烧残渣Residue on ignition (900°C) ≤0.1% (as SO4)
pH 5.5-7.5 (25 °C, 1 M in H2O)
熔点Melting point 119-121 °C
痕量阴离子anion traces by ICP-MS
氯chloride (Cl-): ≤50 ppm
硫酸根sulfate (SO42-): ≤50 ppm
痕量阳离子cation traces by ICP-MS
Al: ≤1 ppm
As: ≤0.1 ppm
Ba: ≤1 ppm
Bi: ≤1 ppm
Ca: ≤5 ppm
Cd: ≤1 ppm
Co: ≤1 ppm
Cr: ≤1 ppm
Cu: ≤1 ppm
Fe: ≤1 ppm
K: ≤5 ppm
Li: ≤1 ppm
Mg: ≤1 ppm
Mn: ≤1 ppm
Mo: ≤1 ppm
Na: ≤5 ppm
Ni: ≤1 ppm
Pb: ≤1 ppm
Sr: ≤1 ppm
Zn: ≤1 ppm
suitability in accordance for LC-MS
品级Grade 质谱专用
(for mass spectroscopy, ≥99.0%)
纯度Purity ≥99.0% (dried material, NT)
不溶物insoluble matter, passes filter test
水分water ≤2%
灼烧残渣Residue on ignition (900°C) ≤0.1% (as SO4)
pH 5.5-7.5 (25 °C, 1 M in H2O)
熔点Melting point 119-121 °C
痕量阴离子anion traces by ICP-MS
氯chloride (Cl-): ≤50 ppm
硫酸根sulfate (SO42-): ≤50 ppm
痕量阳离子cation traces by ICP-MS
Al: ≤1 ppm
As: ≤0.1 ppm
Ba: ≤1 ppm
Bi: ≤1 ppm
Ca: ≤5 ppm
Cd: ≤1 ppm
Co: ≤1 ppm
Cr: ≤1 ppm
Cu: ≤1 ppm
Fe: ≤1 ppm
K: ≤5 ppm
Li: ≤1 ppm
Mg: ≤1 ppm
Mn: ≤1 ppm
Mo: ≤1 ppm
Na: ≤5 ppm
Ni: ≤1 ppm
Pb: ≤1 ppm
Sr: ≤1 ppm
Zn: ≤1 ppm
λ 1 M in H2O
紫外吸收UV absorption
λ: 260 nm A: ≤0.01
λ: 280 nm A: ≤0.01
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