L-丙氨酰-L-谷氨酰胺 L-Alanyl-L-Glutamine

本品为白色或类白色结晶或结晶性粉末;无臭。本品在水中易溶，在乙醇、丙酮或乙醚中不溶。This product is white or white crystal or crystalline powder; Odorless. This product is soluble in water and insoluble in ethanol, acetone or ether.

1. 取本品约 20mg，加水 lml 使溶解，加茚三酮试液 5 滴 ，加热，即显蓝紫色。Take about 20mg of this product, add lml of water to dissolve it, add 5 drops of ninhydrin test solution, heat it to make it appear bluish purple. 2. 本品的红外光吸收图谱应与对照品的图谱一致。The infrared absorption pattern of this product should be consistent with that of the reference product. 3. 在含量测定项下记录的色谱图中，供试品溶液主峰的保留时间应与对照品溶液主峰的保留时间一致。In the chromatogram recorded under content determination, the retention time of the main peak of the test solution should be consistent with that of the control solution.

+9.5 to +11.0°

溶液应澄清无色，如显浑浊，与 1 号浊度标准液比较，不得更浓；如显色，与黄色 1 号标准比色液比较，不得更深。The solution should be clear and colorless, such as turbidity, and no. 1 turbidity standard solution compared, not thicker; If the color is displayed, it shall not be darker than yellow 1 standard colorimetric solution.

≤0.02 %

≤0.02 %

≤0.08 %

≤0.001%

≤0.001%

≤0.0001%

环-(L-丙氨酰-L-谷氨酰胺）≤0.2%; 环-(L-丙氨酰-L-谷氨酸）≤0.04%; L-焦谷氨酰-L-丙氨酸 ≤0.15%; L-焦谷氨酸 ≤0.05%; D-丙氨酰-L-谷氨酰胺 ≤0.05%; L-丙氨酰 -L-谷氨酸 ≤0.5%; 其他单个未知杂质 ≤0.1%; 其他未知杂质总和 ≤0.5%

≤0.5 %

≤0.1 %

98.5~101.0%

5.4 ~ 6.0

需氧菌总数 Total aerobic microbial count ≤50cfu/g; 霉菌和酵母菌总数 Total yeasts and moulds count ≤10cfu/g

≤20 EU/g