Implementation of a Chloride‐selective Electrode Into a Closed Bipolar Electrode System with Fluorimetric Readout,Electroanalysis

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Implementation of a Chloride‐selective Electrode Into a Closed Bipolar Electrode System with Fluorimetric Readout
Electroanalysis ( IF 2.7 ) Pub Date : 2020-01-07 , DOI: 10.1002/elan.201900650
Ewa Jaworska ₁ , Agata Michalska ₁ , Krzysztof Maksymiuk ₁

Affiliation

Applicability of a bipolar electrode system was tested for arrangements containing a typical ion‐selective electrode (ISE) connected with an electrode coated by a conducting polymer characterized by electroluminescence. In this case a selective response of the ISE membrane at one pole of the bipolar electrode is transduced to a fluorimetric signal obtained by reduction of the conducting polymer at the second pole. This signal transformation mode was studied on example of a simple closed bipolar electrode system composed of all‐solid‐state chloride‐selective electrode with polypyrrole transducer as the sensing pole and the reporting pole represented by electrode coated by poly(3‐octylthiophene) (POT) layer characterized by fluorescence in the neutral state. In this system selective and linear dependences of fluorimetric signal on logarithm of chloride ions concentration in turn‐on mode were recorded for optimized external voltage applied. Alternatively, a concept of cascade bipolar electrode system with incorporation of additional bipolar electrode being a polarization source for the sensing bipolar electrode with ISE and POT layer was also tested. A significant advantage of the cascade system is its possibility to work spontaneously without external polarization. For this case also linear calibration plots of fluorimetric signal vs. logarithm of analyte concentration were recorded.

中文翻译：

在带有荧光读数的封闭双极电极系统中实现氯化物选择电极

对双极性电极系统的适用性进行了测试，测试了包含典型离子选择电极（ISE）的装置，该电极与涂有以电致发光为特征的导电聚合物涂层的电极连接。在这种情况下，在双极电极的一个极点处的ISE膜的选择性响应被转换为通过还原第二极处的导电聚合物而获得的荧光信号。以一个简单的封闭双极电极系统为例研究了这种信号转换模式，该系统由全固态氯化物选择电极，聚吡咯换能器作为传感极，报告极由聚（3-辛基噻吩）（POT层）以中性状态的荧光为特征。在该系统中，记录了荧光信号对开启模式下氯离子浓度对数的选择性和线性依赖性，以优化施加的外部电压。备选地，还测试了级联双极电极系统的概念，其中并入了附加的双极电极，作为具有ISE和POT层的感测双极电极的极化源。级联系统的一个显着优点是无需外部极化即可自发工作的可能性。对于这种情况，还记录了荧光信号与分析物浓度对数的线性校准图。还测试了级联双极电极系统的概念，其中并入了额外的双极电极，作为带有ISE和POT层的感应双极电极的极化源。级联系统的一个显着优点是无需外部极化即可自发工作的可能性。对于这种情况，还记录了荧光信号与分析物浓度对数的线性校准图。还测试了级联双极电极系统的概念，其中并入了额外的双极电极，作为带有ISE和POT层的感应双极电极的极化源。级联系统的一个显着优点是无需外部极化即可自发工作的可能性。对于这种情况，还记录了荧光信号与分析物浓度对数的线性校准图。

更新日期：2020-01-07

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