Electrochemical stripping analysis from micro-counter electrode

Electrochemical stripping analysis (anodic, cathodic, or adsorptive) is usually based on the pre-concentration of a target analyte working electrode surface and then measuring its quantity via direct quantitative electrochemical transformation (with refreshed afterwards). In this work, we demonstrate new approach to carry out non-adsorbing species, thus not being directly pre-concentrated (WE), but signal obtained indirectly from counter (CE) where metal ions are reduced electrochemically stripped. Different CE with large area in classical measurements, an ultramicroelectrode chosen here as purposely exploit polarization effect. The concept oxidizing WE one compartment cell while reducing Cu2+ another connected ionic bridge less common “bridge”. deposited Cu analyzed by three-electrode cell, charge shows good linear relationship concentration former cell. As current response (peak) much clearer than small variations corresponding oxidation analyte, it improves resolution raw signal. Besides, may also reduce background blank solution “filtering” non-Faradaic charge. Like analysis, prolong time exchange for higher sensitivity analysis. This work extends applications offers angle electroanalysis capturing signals electrode.