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【求助】对氨基苯酚的药典标准
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| 谁能帮我查到对氨基苯酚在美国药典或是欧洲药典中的相关资料，比如检测方法和限量标准之类的，谢谢了 |
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minmin2372(金币+1):谢谢参与
qinhy(金币+1): 多谢提供，欢迎常来药学版~ 2011-02-09 09:51:40
minmin2372(金币+1):谢谢参与
qinhy(金币+1): 多谢提供，欢迎常来药学版~ 2011-02-09 09:51:40
| Free p-aminophenol— Transfer 5.0 g to a 100-mL volumetric flask, and dissolve in about 75 mL of a mixture of equal volumes of methanol and water. Add 5.0 mL of alkaline nitroferricyanide solution (prepared by dissolving 1 g of sodium nitroferricyanide and 1 g of anhydrous sodium carbonate in 100 mL of water), dilute with a mixture of equal volumes of methanol and water to volume, mix, and allow to stand for 30 minutes. Concomitantly determine the absorbances of this solution and of a freshly prepared solution of p-aminophenol, similarly prepared at a concentration of 2.5 µg per mL, using the same quantities of the same reagents, in 1-cm cells, at the maximum at about 710 nm, with a suitable spectrophotometer, using 5.0 mL of alkaline nitroferricyanide solution diluted with a mixture of equal volumes of methanol and water to 100 mL as the blank: the absorbance of the test solution does not exceed that of the standard solution, corresponding to not more than 0.005% of p-aminophenol. |
2楼2011-01-31 08:32:29
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gwf24633楼
2011-02-22 16:47
minmin2372(金币+1):谢谢参与
