文档介绍：Aspirin(USP 34)
Aspirin contains not less than percent and not more than percent of on the dried basis.
根据干燥品计算,%~%。
Packaging and storage -Preserve in the tight containers.
包装与贮藏-贮藏于封闭的容器中。
USP REFERENCE STANDRANDS<11>-USP Aspirin RS
USP 标准物质-USP 阿司匹林对照品
Identification-
A: Heat it with water for minutes,cool,and add 1 or 2 drops ferric chloride TS: a violed-red color is produced.
鉴别-
水浴加热数分钟,冷却,加入1到2滴FeCl3 试液,测得颜色为紫红色。
B: Infrared Absorption
Loss on Drying-Dry it over silica gel for 5 hours: it loses not more than % of its weight.
干燥失重-硅胶干燥器中干燥5小时,%。
Readily carbonizable substances-Dissolve 500mg in 5ml of sulfuric acid: the solution has no more color than matching fluid Q.
易碳化物-取500mg本品溶于5ml硫酸溶液中,溶液颜色不得深于标准溶液Q。
Residue on Ignition: not more than %.
炙灼残渣-%。
Substances Insoluble in Sodium Carbonate TS-A solution of 500mg in 10ml of warm sodium carbonate TS is clear.
碳酸钠中不容物-取500mg本品溶于10ml温的碳酸钠溶液中,溶液因澄清。
Chloride-Boil with 75ml of water for 5 minutes,cool,add sufficient water to restore the original volume, and filter(过滤).A 25ml portion of the filtrate shows no more chloride than corredponds to(相当于) of hydrochloride acid(%)
***化物-,溶于75ml水中,煮沸5分钟,冷却,加入足量水至原体积,过滤。
取滤液25ml所含*** ***化物(%)。
Sulfate-Dissolve in 37ml of aceto