Abstract Ion transfer electrochemistry is a powerful tool for the study of ionic species in solution. In this paper, square wave voltammetry and chronoamperometry are applied for the quantification and characterization of denatonium ion (N-benzyl-2-(2,6-dimethylphenylamino)-N,N-diethyl-2-oxoethanaminium) in water, an important additive present in commercial products. The method presented is based on the monitoring of the transfer of the cation across a microporous membrane separating an aqueous solution and an organic solution of 1,2-dichloroethane. Calibration curves are built with both techniques and the resulting detection limits and linear ranges of response are discussed. Furthermore, the different performance characteristics of the two techniques are exploited to extract the values of the aqueous diffusion coefficient of the ion denatonium and its standard transfer potential from water to 1,2-dichloroethane. The last parameter is of great importance for the evaluation of the ion lipophilicity, that plays a role in its distribution in living organisms and its impact on biological media.

中文翻译：

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通过极化液/液界面处的离子转移对地那铵离子进行电化学传感和表征

摘要 离子转移电化学是研究溶液中离子种类的有力工具。在本文中，方波伏安法和计时电流法用于定量和表征水中地那铵离子（N-苄基-2-（2,6-二甲基苯基氨基）-N,N-二乙基-2-氧代乙胺），一种重要的添加剂存在于商业产品中。所提出的方法基于对阳离子通过微孔膜的转移进行监测，该膜分离了 1,2-二氯乙烷的水溶液和有机溶液。使用这两种技术构建校准曲线，并讨论了由此产生的检测限和响应的线性范围。此外，利用两种技术的不同性能特征来提取离子地那铵的水扩散系数值及其从水到 1,2-二氯乙烷的标准转移电位。最后一个参数对于评估离子亲脂性非常重要，它在其在生物体中的分布及其对生物介质的影响中发挥作用。