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通过溶解微滴滴电分析来测量液体到液体的扩散系数

Ashutosh Rana¹, Christophe Renault¹, Jeffrey E Dick^1,2

¹Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States.

Analytical chemistry

|December 12, 2023

概括

这项研究引入了一种新的电化学方法,通过追踪非水性滴滴寿命来测量液体扩散系数. 该技术提供了一种可靠的方法来量化各种应用中的扩散.

科学领域:

电化学电化学电化学
物理化学物理化学
化学工程是化学工程的重要组成部分.

背景情况:

扩散在污染控制和药物输送等领域至关重要.
测量液体-液体扩散系数是具有挑战性的,因为分子间力量和界面现象.
现有的方法经常在精确和复杂的实验设置方面扎.

研究的目的:

开发一种创新的电化学方法来确定液体-液体扩散系数.
建立一个可靠和精确的方法来量化基于滴滴生命周期分析的扩散.

主要方法:

使用超微电极在水性氧化还原溶液中与非水性滴滴.
监测电化学电流响应,因为滴滴溶解并暴露电极表面.
分析电压计和电压计当前时间数据以确定滴滴寿命和扩散系数.

主要成果:

成功量化了水中的1,2-二乙烯和酸的扩散系数.
获得的扩散系数为 (11.3 ± 1.2) × 10−6 cm2/s对于1,2-二乙烯和 (5.2 ± 1.1) × 10−6 cm2/s对于酸.
证明了该方法通过电化学信号精确追踪滴滴溶解的能力.

结论:

开发的电化学方法为测量液体扩散系数提供了一种可靠的方法.
滴滴生命周期分析与电化学相结合,为扩散研究提供了精确的替代方案.
这种技术在需要扩散测量的各种科学和工业领域都有潜在的应用.

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