质量标准: |
99%: 外观Appearance 白色结晶粉末,光照下会有颜色 红外光谱鉴别Infrared spectrometry 和对照品匹配 含量Assay >99% (以无水物计) 干燥失重Loss on drying <0.2 % (105°C, 3 hrs) 重金属Heavy metals (as Pb) <10 ppm 硫酸盐灰分Sulfated ash <0.1 % 比旋度Specific rotation [a]20/D +12° ~ +12.8°(c=11, 6 N HCl) NH4 < 100 ppm Cl < 100 ppm SO4 < 100 ppm Fe < 10 ppm 透光率Transmittance >98 % (c=5, H2O, 430 nm) 1 cm cell pH 7 - 8.5 (2% 水溶液) 其它氨基酸Foreign amino acids <0.3 % (TLC) EP, USP ,非动物源,用于细胞培养:
来源ORIGIN from non-animal source 外观Appearance 白色至类白色结晶粉末 红外鉴别IDENTIFICATION BY IR 和参考标准一致 水溶解试验solubility in water 无色溶液 0.5G/10ML水 比旋光度Specific rotation [a]20/D +12.0°~ +12.8°(20°C /EP) +12.6 ~ +14.0 DEG (25°C /USP) C = 11 , 6M HCL 氯Chloride ≤0.020% 铵Ammonium ≤0.02% 硫酸根Sulfate ≤0.020% 铁Iron ≤ PPM 重金属Heavy metals ≤10 PPM 砷Arsenic ≤ 1 PPM 干燥损失Loss on drying ≤0.20% 灼烧残渣Residue on ignition ≤0.10% 茚三酮阳性物质Ninhydrin-positive Substances(OTHER AMINO ACIDS) CONFORMS 溶剂残渣Residual solvents MEETS THE REQUIREMENTS PH TEST 7.0 ~ 8.5 (2% IN WATER) 含量ASSAY (DRY BASIS) 98.5 ~ 101.0% 内毒素Endotoxin ≤ 1 EU/MG 细胞培养测试Cell culture test PASS
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