含量(NaHCO3)Assay,% ≥99.8 99.8 99.8
水溶液反应water Solution
reaction 合格 合格 合格
澄清度试验Clarity 合格 合格 合格
水不溶物Insiluble matter in water,% ≤0.005 0.01 0.02
氯化物及氯酸盐(以Cl计)
Chloride and chlorate,% ≤0.001 0.002 0.005
硫化合物(以SO4计)Sulur
compounds,% ≤0.002 0.005 0.01
氮化合物(N)Nitrogen,% ≤0.0005 0.001 0.002
磷酸盐(以PO4计)Phosphate,% ≤0.001 0.002 0.005
硅酸盐(以SiO3计)Silicate,% ≤0.001 0.005 0.01
镁(Mg)Magnesium,% ≤0.002 0.003 0.005
钾(K）Potassium,%　 ≤0.005 0.01 0.02
铝(Al)Aluminum,% ≤0.005 0.01 0.02
钙(Ca)Calcium,% ≤0.005 0.007 0.001
铁(Fe)Iron,% ≤0.0005 0.001 0.002
重金属(以Pb计)Heavy metals,% ≤0.0005 0.001 0.002
还原碘物质(以HCOOH计) ≤0.005 -- --
Substances reducing iodine

ACS级
项目名称　 ACS Grade
含量(NaHCO3)Assay 99.7-100.3%
水不溶物Insoluble matter ≤0.015%
总氮量(以Cl计)Total chlorine ≤0.003%
磷酸盐(PO4)Phosphate ≤0.003%
铵(NH4)Ammonium ≤5ppm
重金属(以Pb计)Heavy metals ≤5ppm
铁(Fe)Iron ≤0.001%
钙(Ca)Calcium ≤0.02%
镁(Mg)Magnesium ≤0.005%
钾(K)Potassium ≤0.005%

品级Grade 色谱纯
(for HPLC，≥99.0%)
含量assay(calc. based on dry substance) ≥99.0% (T)
pKa (25 °C) (1) 6.37, (2) 10.25 (carbonic acid)
水溶解试验solubility in water 无色透明，0.1 g/mL
λ ≥10 % in H2O
紫外吸光值UV absorption
λ: 240 nm A: ≤0.1
λ: 250 nm A: ≤0.04
λ: 260 nm A: ≤0.02
λ: 280 nm A: ≤0.01
λ: 500 nm A: ≤0.01
RP gradient test Pass

品级Grade 分子生物学
(for molecular biology, 99.7-100.3%)
外观Appearance 白色粉末
红外光谱鉴别Infrared spectrometry Conforms
纯度Purity 99.8 - 100.2% (T)
水溶解试验solubility in water 合格,10g/100ml水
硫化合物Sulfur compounds ≤ 0.003% (AS SULFATE)
重金属Heavy metals ≤ 5 PPM (AS LEAD)
铁Iron(Fe) ≤ 0.001%
钾Potassium(K) ≤ 0.005%
DNASE, RNASE AND PROTEASE NONE DETECTED