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全氟辛酸及其钠盐和十二烷基硫酸钠在R972上的吸附等温线均为S型或LS型，指示固液界面吸附过程中有表面疏水缔合物生成．碳氟表面活性剂的饱和吸附量显著高于碳氢表面活性剂的饱和吸附量．加电解质于液相使各体系吸附量上升．对于碳氟表面活性剂，甚至引起吸附等混线类型变化．例如，不加电解质时全氟辛酸在R972上的吸附等温线为S型，而加入HCl（c＝0．05mol·dm－3）使吸附等混线变成LS型．全氟辛酸比全氟辛酸钠在R972上的吸附更强．几种表面活性剂在R972上的吸附均随温度升高而减少。应用两阶段吸附模型及通用吸附等温线公式可以很好地解释所得实验结果．
Perfluorooctanoic acid and its sodium salt and sodium dodecyl sulfate adsorption isotherm on the R972 are S or LS type, indicating solid-liquid interface adsorption process of surface hydrophobic association formation. The saturated adsorption amount of fluorocarbon surfactant is significantly higher than that of the hydrocarbon surfactant. Add electrolyte in the liquid phase so that the adsorption capacity of the system increased. For fluorocarbon surfactants, even lead to changes in the type of mixing lines. For example, in the absence of electrolyte, the adsorption isotherm of perfluorooctanoic acid on R972 is S-type and HCl (c = 0.05mol-dm-3) Perfluorooctanoate adsorbs more strongly on R972 than perfluorooctanoate. The adsorption of several surfactants on R972 decreased with increasing temperature. The two-stage adsorption model and the general adsorption isotherm equation can well explain the experimental results obtained.