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用激光散射技术结合浊点法测定了加有不同离子强度的四种三价稀土盐（ＬａＣｌ３，ＣｅＣｌ３，Ｌａ（ＮＯ３）３，Ｃｅ（ＮＯ３）３）的Ｃ８－卵磷脂溶液的液－液相分离曲线，从中得出了相分离临界温度（Ｔｃ）和临界浓度（Ｘｃ）随盐类型和盐离子强度变化曲线。发现各种三价盐都使Ｔｃ和Ｘｃ随离子强度的增加先降低，然后再使之升高。其变化也遵循我们导出的式子：ＴＣ＝ＴＣ０＋Ａ１Ｉ１２－Ａ２Ｉ所描述的规律。各种正、负离子对Ｔｃ和Ｘｃ的相对作用程度分别为：Ｃｅ３＋＞Ｌａ３＋；ＮＯ３－＞Ｃｌ－。用液－液相分离曲线的实验数据，根据吉布斯自由能模型，还计算了胶团的作用因子Ｃ和形成因子Δμ．借助这两个表象参数，利用加盐表面活性物胶团溶液的唯象理论，从理论上算出了各两相共存曲线，其结果与实验值的吻合令人满意。
The liquid-liquid phase of C8-lecithin solutions with four trivalent rare-earth salts (LaCl3, CeCl3, La (NO3) 3, Ce (NO3) 3) The curves were separated and the curves of the critical separation temperature (Tc) and the critical concentration (Xc) with the salt type and the salt ionic strength were obtained. It was found that all kinds of trivalent salts decreased Tc and Xc first with the increase of ionic strength and then increased them. The change follows the same rule as we derived: TC = TC0 + A1I12-A2I. The relative contributions of various positive and negative ions to Tc and Xc are: Ce3 +> La3 +; NO3-> Cl-. According to the Gibbs free energy model, the action factor C and the formation factor Δμ of the micelles were also calculated using the experimental data of the liquid-liquid separation curve. By means of these two phenomenological parameters, the two-phase coexistent curves were theoretically calculated by using the phenomenological theory of the surfactant-containing micellar solution. The results are in good agreement with the experimental data.