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对ＮａＣｌ－ＫＣｌ－Ｈ２Ｏ溶液利用离子选择性电极（ＩＳＥ）的连续滴加法，快速测定出响应ＮａＣｌ的电动势，获得与用文献报道的活度系数计算出的电动势相一致的结果。由此电动势出发可以关联得到混合电解质溶液活度系数的Ｐｉｔｚｅｒ方程的参数，计算ＫＣｌ的活度系数同陆小华－Ｍａｕｒｅｒ提出的电解质溶液模型的预测结果也完全一致，表明本文方法可用于混合电解质溶液活度系数的快速测定。
In the NaCl-KCl-H2O solution, ion-selective electrode (ISE) was used to determine the electromotive force in response to NaCl quickly, which was consistent with the electromotive force calculated by the activity coefficient reported in the literature. From the onset of the EMF, the parameters of the Pitzer equation for the activity coefficient of the mixed electrolyte solution can be correlated. The calculation of the activity coefficient of KCl is also in good agreement with the prediction result of the electrolyte solution model proposed by Lu Xiaohua-Maurer, indicating that the method of the present invention can be applied to the mixed electrolyte solution activity The rapid determination of degree coefficient.