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Reference Electrodes with Polymer-Based Membranes—Comprehensive Performance Characteristics

机译：具有聚合物基膜的参比电极—综合性能特征

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摘要

Several types of liquid membrane and solid-state reference electrodes based on different plastics were fabricated. In the membranes studied, equitransferent organic (QB) and inorganic salts (KCl) are dispersed in polyvinyl chloride (PVC), polyurethane (PU), urea-formaldehyde resin (UF), polyvinyl acetate (PVA), as well as remelted KCl in order to show the matrix impact on the reference membranes’ behavior. The comparison of potentiometic performance was made using specially designed standardized testing protocols. A problem in the reference electrode research and literature has been a lack of standardized testing, which leads to difficulties in comparing different types, qualities, and properties of reference electrodes. Herein, several protocols were developed to test the electrodes’ performance with respect to stability over time, pH sensitivity, ionic strength, and various ionic species. All of the prepared reference electrodes performed well in at least some respect and would be suitable for certain applications as described in the text. Most of the reference types, however, demonstrated some weakness that had not been previously highlighted in the literature, due in large part to the lack of exhaustive and/or consistent testing protocols.
机译：制备了几种基于不同塑料的液膜和固态参比电极。在研究的膜中，将等传递有机物（QB）和无机盐（KCl）分散在聚氯乙烯（PVC），聚氨酯（PU），脲醛树脂（UF），聚乙酸乙烯酯（PVA）和重熔的KCl中。为了显示基质对参考膜行为的影响。使用专门设计的标准化测试规程进行恒电位性能的比较。参比电极研究和文献中的一个问题是缺乏标准化的测试，这导致在比较参比电极的不同类型，质量和特性方面存在困难。本文中，开发了多种协议来测试电极的性能，包括长期稳定性，pH敏感性，离子强度和各种离子种类。所有准备的参比电极至少在某些方面表现良好，并且将适用于本文所述的某些应用。但是，大多数参考类型都表现出一些以前没有在文献中强调的弱点，这在很大程度上是由于缺乏详尽和/或一致的测试协议。

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