以乙醇、正丁醇和聚乙烯醇为水相表面活性剂，采用悬滴法测定了氟苯-水溶液体系的界面张力，观测了氟苯-水溶液体系的界面。实验结果表明：氟苯和去离子水相互饱和，氟苯-水体系界面清晰，氟苯液滴的形态和大小不发生变化;体系中界面张力与溶液中表面活性剂浓度间的关系遵守Langmuir-Szyszkowski方程;Sternling和Scriven的界面稳定性判据适用于实验中的氟苯-水体系的界面稳定性判定。

Pendant-drop apparatus used for measuring the interfacial tension of fluorobenzene drop and water is discussed. The ethanol, 1-butanol and polyvinyl alcohol as surfactants are dissolved in water. The interfacial adsorption parameters in these systems are determined experimentally. In this paper, the interface of fluorobenzene drop and water is clear if fluorobenzene and water is saturated mutually in advance. It is shown that the relations between interfacial tension and concentration of surfactant can be described by Langmuir-Szyszkowski equation. The criterion of instability based on sternling and scriven theory can be applied to fluorobenzene drop and water system.