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用分光光度法于２９３±１Ｋ温度下测定了由二价阳离子Ｃｕ（２＋）和高价阴离子（ＣＴＳ）（４－）（３，６－二磺酸根－１，８－二羟基萘酚）形成配阴离子Ｃｕ（ＣＴＳ）（２－）在乙醇－水混合溶剂中的稳定常数随离子强度的变化．溶剂中乙醇的重量百分数分别为０、１０、２０、３０、４０和５０；每个混合溶剂中的离子强度均为０．１－３．０ｍｏｌ·ｄｍ（－３）．分别用推广的Ｄｅｂｙｅ－Ｈｕｃｋｅｌ方程［１］和Ｐｉｔｚｅｒ方程［２］计算了配离子的热力学稳定常数．发现对本体系Ｄｅｂｙｅ－Ｈｕｃｋｅｌ方程完全不能适用，而基于Ｐｉｔｚｅｒ方程的多项式逼近法［３］则可得到满意的结果．简单讨论了介质效应和配位反应的标准迁移自由能．
The formation and distribution of Cu (2+) and Cu (CTS) (4 -) (3,6-disulfonate-1,8-dihydroxynaphthol), which are divalent cations, were measured spectrophotometrically at 293 ± 1K Stability of Anions Cu (CTS) (2-) in Ethanol - Water Mixed Solvents with Ionic Intensity. The weight percentage of ethanol in the solvent is 0, 10, 20, 30, 40 and 50, respectively; and the ionic strength in each mixed solvent is 0.1-3.0 mol · dm (-3). The thermodynamic stability constants of the complex ions were calculated by the generalized Debye-Huckel equation [1] and the Pitzer equation [2]. It is found that the Debye-Huckel equation can not be applied at all. However, the polynomial approximation method based on the Pitzer equation [3] yields satisfactory results. The simple shift of the standard effect of mediation and coordination reaction is briefly discussed.