L-谷氨酰胺 | CP2020 | USP2023 |
含量 | ≥99.0% | 98.5-101.5% |
酸度 | 4.8 ~ 5.8 | / |
比旋度[a]D20 | +6.3°-+7.3° | +6.3°-+7.3° |
比旋度[a]D25 | / | / |
透光 | ≥98.0% | / |
氯化物 | ≤ 0.02% | ≤0.05% |
銨鹽 | ≤ 0.10% | / |
硫酸鹽 | ≤ 0.02% | ≤0.03% |
鐵鹽 | ≤ 10 PPM | ≤30PPM |
重金屬 | ≤ 10 PPM | / |
砷鹽 | ≤1PPM | / |
鉛 | / | |
其他氨基酸 | individual impurities≤0.5% total impurities≤1.0% | ≤0.5% |
茚三酮活性物質(zhì) | / | / |
干燥失重 | ≤ 0.30% | ≤0.30% |
熾灼殘?jiān)?/td> | ≤ 0.10% | ≤0.30% |
內(nèi)毒素 | < 25 EU/g | < 25 EU/g |
總菌 | ≤ 500 CFU/g | ≤ 500 CFU/g |
霉菌&酵母菌 | ≤ 50 CFU/g | ≤ 50 CFU/g |