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本文建立了表述变价态离子电极特殊行为的理论模型,阐明了S-δ经验式及用δ-pH作图法求双质子化离子pK_(a1)的潜在机理.提出更为简便而准确的pK_(a1)二阶微商计算法,并依据电极电位随溶液pH变化的关系求出pK_(a2).
In this paper, we established a theoretical model for describing the special behavior of the valence state ion electrode and expounded the potential mechanism of the S-δ empirical formula and the δ-pH mapping method to find the double proton ion pK_ (a1). The more simple and accurate pK_ (a1) second-order derivative method, and pK_ (a2) is obtained from the relationship between the electrode potential and the solution pH.