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,≥99.0%
(ultra pure,≥99.0% )
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
X-射线衍射分析X-Ray Diffraction         Conforms to Structure
红外光谱Infrared spectrometry           Conforms to Structure
纯度Purity                              ≥99.995% Based On Trace Metals Analysis
总金属杂质Total Metallic Impurities     ≤50ppm by ICP Atomic emission

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