The value of double potential pulse differential techniques for electrochemical studies of dynamic chemical speciation is investigated within the context of liquid|liquid electrochemistry. Then, not only information about the speciation thermodynamics and kinetics is accessible, but also about the species lipophilicity. This provides a comprehensive view of their behaviour in natural and biological media. With the above aim, the current-potential response of the ACDT mechanism (aqueous complexation-dissociation coupled to transfer), where two chemically linked species can transfer between a hydrophilic and a lipophilic phase, is modelled in differential double pulse voltammetry (DDPV) and additive differential pulse voltammetry (ADPV). Explicit closed-form expressions are deduced for both techniques at liquid|liquid macrointerfaces, applicable to any charge number and lipophilicity of the species. The DDPV and ADPV signals are shown to be well sensitive to the features of the chemical reaction, as well as to the species charge and lipophilic character. Also, these techniques offer higher resolution and discrimination against superimposed signals than direct-current techniques, together with high sensitivity and minimization of capacitive effects and background currents, which are key advantages for accurate quantitative analysis.

在液体电化学的背景下，研究了双电势脉冲微分技术在动态化学形态的电化学研究中的价值。这样，不仅可以获得有关物种热力学和动力学的信息，而且还可以获得有关物种亲脂性的信息。这提供了它们在自然和生物介质中行为的全面视图。出于上述目的，采用差动双脉冲伏安法（DDPV）对ACDT机制的电流-电位响应（水络合-解离与转移作用）进行了建模，其中两个化学键合的物质可以在亲水相和亲脂相之间转移。加性差分脉冲伏安法（ADPV）。两种技术都在液体宏界面上推导了显式的闭式表达式，适用于该物种的任何电荷数和亲脂性。DDPV和ADPV信号显示出对化学反应的特征以及物质电荷和亲脂性特征非常敏感。而且，与直流技术相比，这些技术可提供更高的分辨率和对叠加信号的辨别力，并且具有高灵敏度以及电容效应和背景电流的最小化，这对于准确的定量分析而言是关键优势。