质量标准
99%: 外观Appearance 白色结晶或结晶粉末红外光谱鉴别Infrared spectrometry 和对照品匹配纯度Purity ≥99.0% (TLC)水溶解试验Solubility in Water 溶液透明比旋光度Specific rotation [a]20/D +9.0 ~ +10.3 °(c=11, 6 N HCl)重金属Heavy metals (as Pb) <10 ppm硫酸盐灰分Sulfated ash <0.1 %其它氨基酸Other amino acids <0.5 % (TLC)干燥损失Loss on drying ≤2.0 %SO4 < 200 ppmNH4 < 100 ppmFe < 10 ppmpH 3 - 5 (2.5% 溶液,25°C) 品级Grade 非动物源,EP, JP, USP ;用于细胞培养,98.5 to 101.0% (from non-animal source, EP, JP, USP, for cell culture, 98.5 to 101.0%)来源origin non-animal source外观appearance white crystalline powder红外鉴别试验identification by ir compares to reference standard氯chloride 16.66 - 17.08 %铵ammonium ≤ 0.02%硫酸盐sulfate ≤ 0.020%铁iron ≤ 10 ppm重金属heavy metals ≤ 10 ppm砷arsenic ≤ 1 ppm 灼烧残渣residue on ignition ≤ 0.10%残留溶剂residual solvents meets the requirements茚三酮阳性物质ninhydrin-positive substances (other amino acids) conforms 含量assay (dry basis) 98.5 to 101.0%内毒素endotoxin assay ≤ 1 eu/mg细胞培养测试cell culture test pass 品级Grade 超纯级, ≥99.5% (AT) (Ultra pure,≥99.5% (AT))外观Appearance 白色粉末红外光谱鉴别Infrared spectrometry 和对照品匹配纯度Purity((AT) ≥99.5% 比旋光度Specific rotation [α]20/D +9.5±0.5°, c = 5% in 5 M HClpH 3.0-4.0 (25 °C, 0.5 M in H2O) 灼烧残渣Residue on ignition(as SO4) ≤0.05% 干燥损失loss on drying, 20 °C (HV) ≤0.05% 水溶性solubility H2O: soluble0.5 M at 20 °C, clear, colorless 硫酸根sulfate (SO42-): ≤100 ppm 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 NH4+: ≤500 ppm Na: ≤50 ppm Ni: ≤5 ppm Pb: ≤5 ppm Sr: ≤5 ppm Zn: ≤5 ppmλ 0.5 M in H2OUV absorption λ: 260 nm A: ≤0.05 λ: 280 nm A: ≤0.05