L-丙氨酸
产品指标：
|
L-丙氨酸 |
CP2015 |
AJI92 |
USP40 |
USP32 |
GB25543-2010 |
|
性状 |
应为白色或类白色结晶或结晶性粉末 |
应为白色结晶或结晶性粉末 |
--- |
--- |
应为白色结晶或结晶性粉末 |
|
鉴别 |
应符合规定 |
应符合规定 |
应符合规定 |
--- |
--- |
|
含量 |
≥98.5% |
99.0%～101.0% |
98.5%～101.5% |
98.5%～101.5% |
98.5%～101.5% |
|
pH |
5.5~7.0 |
5.7~6.7 |
5.5～7.0 |
5.5～7.0 |
5.7~6.7 |
|
透光率 |
≥98.0% |
≥98.0% |
--- |
--- |
--- |
|
干燥失重 |
≤0.2% |
≤0.20% |
≤0.2% |
≤0.2% |
≤0.20% |
|
炽灼残渣 |
≤0.1% |
≤0.10% |
≤0. 15% |
≤0.1% |
≤0.20% |
|
氯化物 |
≤0.02% |
≤0.020% |
≤0.05% |
≤0.05% |
--- |
|
重金属 |
≤0.001% |
≤10ppm |
≤15ppm |
≤15ppm |
≤10mg/kg |
|
铁盐 |
≤0.001% |
≤10ppm |
≤0.003% |
≤0.003% |
--- |
|
硫酸盐 |
≤0.02% |
≤0.020% |
≤0.03% |
≤0.03% |
--- |
|
细菌内毒素 |
＜20EU/g |
--- |
--- |
--- |
--- |
|
砷盐 |
≤0.0001% |
≤1ppm |
--- |
--- |
≤1mg/kg |
|
铵盐 |
≤0.02% |
≤0.02% |
--- |
--- |
--- |
|
其他氨基酸 |
应符合规定 |
应符合规定 |
应符合规定 |
--- |
--- |
|
热源 |
--- |
应符合规定 |
-- |
--- |
--- |
|
比旋度 |
+14.0° ～ +15.0° |
+14.3°~+15.2° |
﹢13.7°～﹢15.1° |
﹢13.7°～﹢15.1° |
+13.5~+15.5 |
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