In this paper, we introduce a novel approach for the detection of electroactive analytes by using oxidant species accumulated in pseudocapacitors surface. We demonstrated that pseudocapacitors can be quickly discharged when in contact with electroactive species. Thus, the variation of potential can be monitored during the discharging process and correlated with the analyte concentration. Based on this, two electroanalytical methods were proposed: continuous discharging detection and pulsed discharging detection. As a proof of concept, these methods were employed for glucose, fructose and sucrose detection using an ion chromatograph containing an electrochemical detector. Copper|cupric oxide in alkaline medium was used as the pseudocapacitive system. The obtained results proved to be very promising and the analytical curves showed good linearity in both methods. In addition, this novel approach for the detection of saccharides based on potential variation as a result of the discharging of the pseudocapacitor in contact with the analyte is very attractive because it does not require current reading. Therefore, our approach can be applied to other pseudocapacitive systems, opening new possibilities for several electroanalytical applications.

中文翻译：

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一种利用电活性物质对赝电容器放电进行电分析测定的新方法

在本文中，我们介绍了一种通过使用赝电容器表面积累的氧化剂来检测电活性分析物的新方法。我们证明了赝电容器在与电活性物质接触时可以快速放电。因此，可以在放电过程中监测电位的变化并与分析物浓度相关联。在此基础上，提出了两种电分析方法：连续放电检测和脉冲放电检测。作为概念证明，这些方法用于使用包含电化学检测器的离子色谱仪检测葡萄糖、果糖和蔗糖。使用碱性介质中的氧化铜作为赝电容系统。获得的结果证明是非常有希望的，并且两种方法的分析曲线都显示出良好的线性。此外，这种基于与分析物接触的赝电容器放电导致的电位变化来检测糖类的新方法非常有吸引力，因为它不需要电流读数。因此，我们的方法可以应用于其他赝电容系统，为几种电分析应用开辟了新的可能性。