Electrochemical impedance study and sensitive voltammetric determination of Pb(ii) at electrochemically activated glassy carbon electrodes

Electrochemical impedance spectroscopy of diluted solutions of Bisphenol A

“…This difference in results could be due to the flow conditions used by the experimenters in Ref. [30].…”

“…A technique capable of measuring these small changes is the electrochemical impedance spectroscopy (EIS), always that a suitable equivalent circuit of the system is available. Many authors have found that small changes in the morphology, composition and reactivity of different electrodes can be quantified employing the impedance spectroscopy, characterizing in electrical terms some variables like ions migration, film formation, interactions between molecules and roughness of surfaces [23][24][25][26][27][28][29][30]. For example, Yan and Sadik developed a reproducible method that provides a generic approach for ds-DNA based sensor development and for the monitoring of DNA-analyte interactions.…”

Recent Updates of Chemically Modified Electrodes in Analytical Chemistry

“…However, the exact cause for the process was not discussed. Zen et al investigated a similar type of GCE* for Pb 2 accumulation and quantification [35]. It was concluded that the anodization leads to quinolic and phenonic functional groups on the GCE surface, which further help for the attractive interaction with Pb 2 .…”

Simultaneous Determination of Hydroquinone and Catechol at an Activated Glassy Carbon Electrode

“…The polished and cleaned GCEs were then subjected for electrochemical activation in a 0.1 M PBS (pH 7.0) as described elsewhere [32]. In this work, we applied a constant potential of þ 1.7 V for 400 s, which we found as the optimum condition for the electrochemical anodization of GCE.…”