The convergence analysis of Ni (II) and Zn (II) and L- Glutamine complexes were studied using (0–50% v/v) dimethylformamide (DMF)-water mixtures potentiometrically at temperature 301.0 K, having an ionic strength of 0.15 mol L⁻¹. The complex species models were analysed by a well-defined computer Programme MINIQUAD75. Exhaustive modeling have been carried out on a number of complex species. The main complex species formed have been found of NiL₂, NiL₂H_, NiL₂H_2, ZnL₂, ZnL₂H and ZnL₂H₂ type. On the basis of the statistical parameters the best fit chemical modelling have been applied. The statistical data analysis validated the complex species. The occurrence of columbic interactions over non-columbic interactions have been identified by linear variation stability of the medium with the help of mole fraction, and the preference of non-columbic interactions over columbic interactions as per linear variation of stability are because of dielectric constants of the medium.

使用 (0–50% v/v) 二甲基甲酰胺 (DMF)-水混合物在温度 301.0 K、离子强度为 0.15 mol L ^-1。复杂物种模型通过定义明确的计算机程序 MINIQUAD75 进行分析。已经对许多复杂物种进行了详尽的建模。已发现形成的主要络合物有NiL ₂、NiL ₂ H _、 NiL ₂ H _{2 、} ZnL ₂、ZnL ₂ H 和ZnL ₂ H ₂类型。在统计参数的基础上，应用了最佳拟合化学模型。统计数据分析验证了复杂的物种。在摩尔分数的帮助下，通过介质的线性变化稳定性确定了库伦相互作用比非库伦相互作用的发生，并且根据稳定性的线性变化，非库伦相互作用优先于库伦相互作用是因为介电常数为媒介。