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An Electrochemical Approach to Quantification of Volatile Organic Solvents Dispersed in Solution – Towards Bipolar Electrode Sensors
Electroanalysis ( IF 3 ) Pub Date : 2021-09-14 , DOI: 10.1002/elan.202100292
Dawid Kałuża 1 , Katarzyna Węgrzyn 1 , Brian Kaczmarczyk 1 , Marianna Gniadek 2 , Krzysztof Maksymiuk 3 , Agata Michalska 1
Affiliation  

A novel approach to electrochemical determination of volatile organic compounds (VOCs) suspended in a solution is proposed. This approach benefits from properties of capacitors linked in series, where the total capacitance is affected by analyte induced changes. A tailor designed hydrophobic PVDF membrane modified with polyoctylthiophene used in this arrangement played a role of a bipolar electrode. The presence of water immiscible liquid VOCs results in spontaneous formation of a thin film on the surface of the hydrophobic polymer membrane and dissolution of modifying particulates. This effect leads to change of electrical parameters of the system: capacitance and resistance dependent on amount of VOCs present in the aqueous phase.

中文翻译:

一种量化分散在溶液中的挥发性有机溶剂的电化学方法——迈向双极电极传感器

提出了一种电化学测定悬浮在溶液中的挥发性有机化合物 (VOC) 的新方法。这种方法受益于串联电容器的特性,其中总电容受分析物引起的变化的影响。定制设计的疏水性 PVDF 膜用聚辛基噻吩改性,用于这种布置,起到双极电极的作用。与水不混溶的液体 VOC 的存在导致疏水聚合物膜表面自发形成薄膜并溶解改性颗粒。这种效应导致系统的电参数发生变化:电容和电阻取决于水相中存在的 VOC 的量。
更新日期:2021-09-14
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