L-色氨酸

AJI92

USP32

USP40

性状

应为白色至淡黄色白色结晶或结晶性末

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鉴别

应符合规定

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应符合规定

含量

98.5%~100.5%

98.5%~101.5%

98.5%~101.5%

pH

5.4~6.4

5.5~7.0

5.5~7.0

透光率

≥95.0%

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干燥失重

≤0.20%

≤0.3%

≤0.3%

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

≤20ppm

≤30ppm

≤30ppm

硫酸盐

≤0.020%

≤0.03%

≤0.03%

细菌内毒素

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砷盐

≤1ppm

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铵盐

≤0.02%

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其他氨基酸

应符合规定

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热源

应符合规定

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比旋度

-30.0° ~ -32.5°

-29.4°~-32.8°

-29.4°~ -32.8°

有机杂质

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应符合规定