用ISE法快速测定混合电解质溶液的活度系数  

DETERMINATION OF ACTIVITY COEFFICIENTS FOR MIXED ELECTROLYTE AQUEOUS SOLUTIONSUSING A FLOW METHOD

作　　者：张吕正[1] 罗家基[1] 陆小华[1] 王延儒[1] 

机构地区：[1]南京化工学院化学工程系

出　　处：《南京化工学院学报》1994年第4期65-68,共4页

基　　金：国家教委资助;回国人员科研基金

摘　　要：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。A flow electromotive force(EMF)method proposed by the authors to determine activity coefricients for electrolyte solutions was applied to mixed electrolyte systems, For NaCl-KCl-H2O system,a set of EMF data of the cell:Na+-ISE|NaCl(m1),KCl(m2),H2O|AgCl/Ag were measuredusing ion selective electrodes(ISE).The EMF data in the solution were consistent with those calculated from achvity cdefficients for NaCl reported in literature.The methd in this work could be used to determine activity coefficients formlxed electrolyte aqueous solutions.

关 键 词：活度系数 混合电解质 溶液 离子选择电极 电解质 

分 类 号：O645.17[理学—物理化学]