Electrochemiluminescence Behavior of Luminol at Closed Bipolar Electrode and Its Analytical Application

A new closed bipolar electrode electrochemiluminescence (ECL)-based device was designed and used to investigate the ECL behaviors of luminol in this device. The results showed that while a suitable voltage was applied to the two poles of the closed bipolar electrode, both the positive charge ions and luminol-based anionic ions could be enriched on the two poles of the closed bipolar electrode, respectively. More importantly, the ECL signals, generated from the electro-oxidation of luminol on anodic pole, was found to be related to the total amount of positive charged ions on the cathodic pole of the closed bipolar electrode. Under the optimum conditions, the ECL response was linearly to the concentration of analyte in the range of 1.0 × 10−9−1.0 × 10−8 M with a detection limit of 1.1 × 10−10 M. Based on this finding, a new ECL method for sensing the solution conductance was firstly developed.

Here we design a new closed bipolar electrode electrochemiluminescence (ECL)-based device. When a suitable voltage is applied to the two poles of the closed bipolar electrode, luminol anionic ions are enriched on anodic pole and the ECL signals from the electro-oxidation of luminol are related to the total amount of positive charged ions on the cathodic pole of the closed bipolar electrode. Based on this finding, a new ECL method for sensing the solution conductance is firstly developed.Figure optionsDownload as PowerPoint slide