A series of fatty acid monoethanolamide ether carboxylates(AMEC) were purified by extracting with hot ethanol and recrystallizing with petrol ether.
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通過(guò)無(wú)水乙醇熱溶抽濾,石油醚重結晶等工序建立了酰胺醚羧酸鹽的提純方法,考察了溶劑用量、結晶溫度、結晶時(shí)間等對石油醚重結晶效果的影響。
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国内精品美女A∨在线播放xuan