| L-天門冬氨酸 | USP32 | AJI92 |
| 含量 | 98.5~101.5% | 99.0-100.5% |
| 酸度 | / | 2.5-3.5 |
| 比旋度[a]D20 | + 24°~ + 26° | +24.8°-+25.8° |
| 比旋度[a]D25 | / | / |
| 透光 | / | ≥98.0% |
| 氯化物 | ≤ 0.02% | ≤0.02% |
| 銨鹽 | / | ≤0.02% |
| 硫酸鹽 | ≤ 0.03% | ≤0.02% |
| 鐵鹽 | ≤ 0.001% | ≤10PPM |
| 重金屬 | ≤ 0.001% | ≤10PPM |
| 砷鹽 | / | ≤1PPM |
| 其他氨基酸 | / | conform |
| 茚三酮活性物質(zhì) | / | / |
| 干燥失重 | ≤ 0.5% | ≤0.20% |
| 熾灼殘?jiān)?/td> | ≤ 0.1% | ≤0.10% |
| 總菌 | ≤ 1000 CFU/g | ≤ 1000 CFU/g |
| 霉菌&酵母菌 | ≤ 100 CFU/g | ≤ 100 CFU/g |