【摘要】 <正> 一、测定原理 饱和气流气相色谱法测定无限稀释活度系数γ~∞(以下简写为γ~∞)是1977年Leroi等提出的新方法。该法样品用量少,操作简便迅速,对试剂纯化度要求不苛,可方便地测定溶质在难挥发性溶剂中的γ~∞;经我们改进也能测定溶质在易挥发性溶剂中的γ~∞。 本法的测定原理是:恒定流速的惰性气体与釜更多还原

【Abstract】 A new equilibrium cell is designed for the determination of activity coefficients at infinite dilution by inert gas stripping and gas chroma-tography. The structure of the new cell,its evaluation and application are described in detail. A presaturation cell is setting in front of the equilibrium cell to suppress evaporation of the solvent in it, thus keeping the weight of solvent constant.The reliability of the experimental results are confirmed by determining the limiting activity coefficients of n-hexane in N-methyl pyrrolidoae and ethanol in toluene.更多还原