| L-谷氨酰胺 | CP2020 | USP2023 | USP32 | FCC11 | JSFA |
| 含量 | ≥99.0% | 98.5-101.5% | 98.5-101.5% | 98.5-101.5% | 98.0%～102.0% |
| 酸度 | 4.8 ～ 5.8 | / | / | / | 4.5～6.0 |
| 比旋度[a]D20 | +6.3°-+7.3° | +6.3°-+7.3° | +6.3°-+7.3° | +6.3°-+7.3° | +6.3°-+7.3° |
| 比旋度[a]D25 | / | / | / | / | / |
| 透光 | ≥98.0% | / | / | / | Colorless and clear |
| 氯化物 | ≤ 0.02% | ≤0.05% | ≤0.05% | / | ≤ 0.1 % |
| 铵盐 | ≤ 0.10% | / | / | / | / |
| 硫酸盐 | ≤ 0.02% | ≤0.03% | ≤0.03% | / | / |
| 铁盐 | ≤ 10 PPM | ≤30PPM | ≤30PPM | / | / |
| 重金属 | ≤ 10 PPM | / | ≤15PPM | / | ≤2PPM |
| 砷盐 | ≤1PPM | / | / | / | ≤3PPM |
| 铅 | / | / | / | ≤5PPM | / |
| 其他氨基酸 | Individual impurities≤0.5% Total impurities≤1.0% | ≤0.5% | ≤0.5% | / | / |
| 茚三酮活性物质 | / | / | / | / | / |
| 不溶性杂质 | / | / | / | ≤50PPM | / |
| 干燥失重 | ≤ 0.30% | ≤0.30% | ≤0.30% | ≤0.30% | ≤0.30% |
| 炽灼残渣 | ≤ 0.10% | ≤0.30% | ≤0.30% | ≤0.10% | ≤0.10% |
| 总菌 | ≤ 1000 CFU/g | ≤ 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 | ≤ 100 CFU/g |
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