| L-胱氨酸 | EP11 | USP2023 | AJI92 | FCC11 |
| 含量 | 98.5-101.0% | 98.5-101.5% | 98.5-101.0% | 98.5-101.5% |
| 酸度 | / | / | 5.0-6.5 | / |
| 比旋度[a]D20 | -218°--224° | -215°--225° | -215°--225° | -215°--225° |
| 比旋度[a]D25 | / | / | / | / |
| 透光 | / | / | ≥98.0% | / |
| 溶液外觀 | clear & colorless≤Y7 | / | / | / |
| 氯化物 | ≤0.02% | ≤0.02% | ≤0.02% | / |
| 銨鹽 | ≤0.02% | / | ≤0.02% | / |
| 硫酸鹽 | ≤0.03% | ≤0.02% | ≤0.02% | / |
| 鐵鹽 | ≤10PPM | ≤10PPM | ≤20PPM | / |
| 重金屬 | / | / | ≤10PPM | ≤5PPM |
| 砷鹽 | / | / | ≤1PPm | / |
| 其他氨基酸 | / | Individual impurities≤0.2% Total impurities≤2.0% | conform | / |
| 茚三酮活性物質(zhì) | Each impurity≤0.2% Total impurities≤0.5% | / | / | / |
| 干燥失重 | ≤0.50% | ≤0.20% | ≤0.20% | ≤0.20% |
| 熾灼殘渣 | ≤0.10% | ≤0.10% | ≤0.10% | ≤0.10% |
| 總菌 | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
| 霉菌&酵母菌 | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g | ≤ 100 CFU/g |
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