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项目 生化试剂级
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BC
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纯度assay ≥99%(T)
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水分Moistrue ≤0.5%
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重金属Heavy Metals <5PPM
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pH(1% in H2O) 4.7-6.0
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项目 超纯级
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纯度assay ≥99.0%(T)
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水分Moistrue ≤0.5%
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铁Iron(Fe) <5PPM
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氯Chloride ≤0.005%
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硫酸根Sulfate ≤0.005%
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重金属Heavy Metals （as Pb) <5PPM
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灼烧残渣Residue On Ignition ≤0.1%
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A260(1M,water): ≤0.025
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A280(1M,water): ≤0.020
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品级Grade 分子生物学级
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(grade for molecular biology)
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含量assay ≥99.0% (AT)
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DNA酶DNases, none detected
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RNA酶RNases, none detected
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不溶物insoluble matter, passes filter test
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磷酸酶phosphatases, none detected
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蛋白酶proteases, none detected
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细胞培养测试cell culture test Pass
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灼烧残渣ign. residue ≤0.2% (as SO4)
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干燥损失loss on drying ≤0.2% , 110 °C
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pH 2.5-4.0 (25 °C, 4 M in H2O)
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useful pH range 7.0 - 9.0
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pKa (25 °C) 8.1
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水溶性solubility H2O: soluble4 M at 20 °C, clear, colorless
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硫酸根sulfate (SO42-): ≤50 ppm
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Al: ≤5 ppm
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As: ≤0.1 ppm
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Ba: ≤5 ppm
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Bi: ≤5 ppm
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Ca: ≤10 ppm
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Cd: ≤5 ppm
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Co: ≤5 ppm
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Cr: ≤5 ppm
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Cu: ≤5 ppm
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Fe: ≤5 ppm
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K: ≤50 ppm
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Li: ≤5 ppm
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Mg: ≤5 ppm
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Mn: ≤5 ppm
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Mo: ≤5 ppm
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Na: ≤50 ppm
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Ni: ≤5 ppm
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Pb: ≤5 ppm
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Sr: ≤5 ppm
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Zn: ≤5 ppm
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λ 4 M in H2O
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UV absorption
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290nm A ≤0.05 AT (40% W/W)
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260nm A ≤0.06 AT (1M IN WATER)
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280nm A ≤0.06 AT (1M IN WATER
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