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应用Corning一价阳离子选择电极(M+~ISE)和Orion氯离子选择性电极(Cl-~ISE)组成可逆电池,即Cl-~ISE/RbCl(m),H2O(1-x),DMF(x)/M+~ISE通过测定上述测量电池的标准电动势(E0m/mV),根据溶液热力学原理,运用扩展的Debye~Hückel公式,计算求得了RbCl由H2O至(H2O~DMF)混合溶剂的标准迁移自由能(ΔG0t/kJ·mol-1)和RbCl在(H2O~DMF)混合溶剂中的活度系数(γ±),并对上述热力学性质随混合溶剂组成的变化规律进行了初步的讨论.
The reversible cells were composed of Corning monovalent cation selective electrode (M + ~ ISE) and Orion chloride selective electrode (Cl- ~ ISE), namely Cl- ~ ISE / RbCl ) / M + ~ ISE The standard migration of RbCl from H2O to (H2O ~ DMF) was calculated by measuring the standard electromotive force (E0m / mV) of the above measured cell and the extended Debye ~ Hückel equation according to the thermodynamics of the solution The activity coefficient (γ ±) of ΔG0t / kJ · mol-1 and RbCl in (H2O ~ DMF) mixed solvents was also discussed. The thermodynamic properties of the mixed solvents were also discussed.