L-丝氨酸
分子量:105.09
CAS号:56-45-1
L-丝氨酸 |
AJI92 |
USP32 |
USP40 |
性状 |
应为白色结晶或结晶性粉末 |
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--- |
鉴别 |
应符合规定 |
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应符合规定 |
含量 |
99.0%~101.0% |
98.5%~101.5% |
98.5%~101.5% |
pH |
5.2~6.2 |
5.5~6.5 |
--- |
透光率 |
≥98.0% |
--- |
--- |
干燥失重 |
≤0.20% |
≤0.2% |
≤0.2% |
炽灼残渣 |
≤0.10% |
≤0.1% |
≤0.1% |
氯化物 |
≤0.020% |
≤0.05% |
≤0.05% |
重金属 |
≤10ppm |
≤15ppm |
≤15ppm |
铁盐 |
≤10ppm |
≤30ppm |
≤30ppm |
硫酸盐 |
≤0.020% |
≤0.03% |
≤0.03% |
细菌内毒素 |
--- |
--- |
--- |
砷盐 |
≤1ppm |
--- |
--- |
铵盐 |
≤0.02% |
--- |
--- |
其他氨基酸 |
应符合规定 |
--- |
应符合规定 |
热源 |
应符合规定 |
--- |
--- |
比旋度 |
﹢14.4°~﹢15.5° |
﹢14.0°~﹢15.6° |
﹢14.0°~﹢15.6° |
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