大值无限稀释活度系数的测定  

DETERMINATION OF LARGE VALUE ACTIVITY COEFFICIENTS AT INFINITE DILUTION

作　　者：鲍坚斌 黄强[1] 陈庚华[1] 韩世钧[1] 

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《物理化学学报》1993年第6期724-727,共4页Acta Physico-Chimica Sinica

基　　金：浙江省自然科学基金;浙江大学科学基金

摘　　要：<正> 测定无限稀释活度系数γ~∞的气提法自1977年由Leroi 等提出至今已有十余年的历史,其发展十分迅速.应用该方法可测定常规的如醇烃、烃烃、酮烃等体系的γ~∞,还用来测定高粘度体系、含食品或油类体系的γ~∞,显示出这种方法具有适应面广的特点.本工作将进一步尝试拓宽其测定范围—提出连续采样技术实现大值无限稀释活度系数(γ~∞>10~2)的测定.Continuous sampling technique—an improvement of the gas stripping method has been pro-posed for the determination of large value activity coefficients at infinite dilution(γ~∞>10~2).Inthis technique,the outlet gas flow from the equilibrium cell is introduced directly into a detectorof a gas chromatograph.The curve of the concentration of the solute in the flow gas versus thestripping time will be gained continueously,and the variation slope can be obtained more precisely.Experimental activity coefficient results have been compared with the literature values which wereobtained by the other methods.

关 键 词：无限稀释 活度系数 采样 气提法 

分 类 号：O655.9[理学—分析化学]