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应用拟二元体系方法将非理想二元混合表面活性剂体系的吸附理论推广到非理想三元体系并建立了三元体系的表面张力方程．由此对含有３个组分的多元体系，根据各单一表面活性剂体系的γ－ ｌｇＣ曲线和所有两组分间的相互作用参数βｓｉｊ（ｉ＝ １．２．３？ｊ＝ １．２．３？ｉ≠ｊ ）即可预测达到给定表面张力下降所需的不同体相组成的混合体系的浓度和混合吸附单层的组成，或者应用所建表面张力方程预测混合物溶液的表面张力．应用于ＡＥＳ／ＡＥＯ９／ＤＰＣｌ＋ ０．１ ｍ ｏｌ／Ｌ ＮａＣｌ非理想三元混合体系，理论预测结果与实验结果一致．
The quasi-binary system method is used to extend the adsorption theory of non-ideal binary mixed surfactant system to non-ideal ternary system and establish the surface tension equation of the ternary system. Thus, for the multivariate system with three components, the γ-lgC curve for each single surfactant system and the interaction parameter βsij between all two components (i = 1.2.3? J = 1.2. 3? I ≠ j) to predict the concentration of the mixed system and the composition of the mixed adsorbed monolayer for achieving the desired decrease in surface tension, or to predict the surface tension of the mixture solution using the established surface tension equation. Applied to the AES / AEO9 / DPCl + 0.1 mol / L NaCl non-ideal ternary mixed system, the theoretical predictions are consistent with the experimental results.