Numerical simulations of linear scan anodic stripping voltammetry at a modified square array of hemispherical microelectrodes located in a thin-layer cell

Voltammetric Microsystem for Trace Elements Monitoring

“…5. [29] In addition, measurements are done in a thin layer cell and not in the usual semiinfinite media. This behavior was confirmed by performing calibration curves at different deposition times (Table 1).…”

“…It can be seen that the peak current intensity does not vary linearly with the deposition time but is slightly curved. [29] The voltammetric cell was then integrated with the PLM in the microsystem. When deposition time increases, the sensitivity, i.e., the slope of the calibration curve, decreases.…”

Recent Developments in Stripping Analysis on Microelectrodes

“…Theoretical studies of arrays (or ensembles) of microelectrodes have also been carried out and, because of the complexity of the task, numerical simulations have often been used [66][67][68][69][70][71][72][73][74][75]. In fact, for microelectrode arrays (or ensembles), in addition to single electrode size and shape, interelectrode spacing must also be considered in order to achieve a steady-state (or pseudo steady-state, depending on the geometry of the single microelectrode).…”

“…These methods also allow full characterization of the arrays and provide the number of active sites [72]. The current responses of microelectrode arrays with other electrode geometries such as hemispherical [73,74], band and hemicylindrical interdigitated configurations [75] have also been predicted. Ref.…”

“…Ref. [74], describes the numerical simulation of linear scan anodic stripping voltammetry of square arrays of hemispherical and slightly recessed microelectrodes located in a thin layer cell. The latter work addresses the mass transport problems associated with so-called gel-integrated (mercury) microelectrode systems (GIME), which are widely employed for in-situ analysis of trace elements in aquatic systems [38].…”