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nirenjie0627(金币+30, 翻译EPI+1):谢谢，各分一半吧！ 2010-12-05 19:57:32
这样子：）
The Gemini cationic surfactant was composed from the bromination and quaternization of the raw solution, which was obtained by dissolving diethylene glycol, phosphorus tribromide and tertiary amine in isopropanol solvent. Structure characterization of the reaction product, recrystaled from ethanol-ethyl acetate mixture, was carried out through IR and1 HNMR. The content was determined to be more than 95% by means of diphasictitration -with bromophenol blue as the indicator and chloroform as the dispersed phase- which, is a more trouble-saving method than those demanding demarcation of anionicsurfaceactiveagent standard solution in references, and also,more efficient and accurate. The as-composed high-purity Gemini cationic surfactant guarantees the reliability of subsequent theoretical research of solubilization and phase behavior. |
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