L-亮氨酸

AJI92

USP24

USP34

USP40

性状

应为白色结晶或结晶性粉末

白色结晶性粉末

白色结晶性粉末

---

鉴别

应符合规定

----

---

应符合规定

含量

99.0%~100.5%

98.5%~101.5%

98.5%~101.5%

98.5%~101.5%

pH

5.5~6.5

5.5~7.0

5.5~7.0

5.5~7.0

透光率

≥98.0%

---

---

---

干燥失重

≤0.20%

≤0.20%

≤0.2%

≤0.2%

炽灼残渣

≤0.10%

≤0.20%

≤0.4%

≤0.4%

氯化物

≤0.020%

≤0.05%

≤0.05%

≤0.05%

重金属

≤10ppm

≤15ppm

≤15ppm

≤15ppm

铁盐

≤10ppm

≤30ppm

≤30ppm

≤30ppm

硫酸盐

≤0.020%

≤0.03%

≤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

---

≤0.5%

---

热源

应符合规定

---

---

---

有机挥发物

---

应符合规定

---

---

菌落总数

---

≤1000cfu/g

---

---

比旋度

+14.9°~+16.0°

+14.9°~+17.3°

+14.9°~+17.3°

+14.9°~+17.3°

相关化合物

---

---

---

应符合规定