| L-谷氨酸 | CP2020 | EP11 | USP2023 |
| 含量 | ≥98.5% | 98.5-100.5% | 98.5-101.5% |
| 酸度 | / | / | / |
| 比旋度[a]D20 | +31.5°-+32.5° | +30.5°-+32.5° | +31.5°-+32.5° |
| 比旋度[a]D25 | / | / | / |
| 透光 | ≥98.0% | / | / |
| 溶液外觀 | / | clear & colorless | / |
| 氯化物 | ≤0.02% | ≤0.02% | ≤0.02% |
| 銨鹽 | ≤0.02% | ≤0.02% | / |
| 硫酸鹽 | ≤0.02% | ≤0.03% | ≤0.02% |
| 鐵鹽 | ≤5PPM | ≤10PPM | ≤10PPM |
| 重金屬 | ≤10PPM | / | / |
| 砷鹽 | ≤1PPM | / | / |
| 其他氨基酸 | ≤0.50% | / | individual impurities≤0.5% total impurities≤2.0% |
| 茚三酮活性物質 | / | conform | / |
| 干燥失重 | ≤0.50% | ≤0.50% | ≤0.10% |
| 熾灼殘渣 | ≤0.10% | ≤0.10% | ≤0.10% |
| 內毒素 | conform | conform | conform |
| 總菌 | ≤ 500 CFU/g | ≤ 500 CFU/g | ≤ 500 CFU/g |
| 霉菌&酵母菌 | ≤ 50 CFU/g | ≤ 50 CFU/g | ≤ 50 CFU/g |
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